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Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2017	Oct. 30, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Trading Symbol	IBP
Entity Registrant Name	INSTALLED BUILDING PRODUCTS, INC.
Entity Central Index Key	0001580905
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		31,862,561

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 67,008	$ 14,482
Investments	25,114
Accounts receivable (less allowance for doubtful accounts of $4,846 and $3,397 at September 30, 2017 and December 31, 2016, respectively)	185,470	128,466
Inventories	44,074	40,229
Other current assets	19,599	9,214
Total current assets	341,265	192,391
Property and equipment, net	78,045	67,788
Non-current assets
Goodwill	153,660	107,086
Intangibles, net	140,714	86,317
Other non-current assets	9,969	8,513
Total non-current assets	304,343	201,916
Total assets	723,653	462,095
Current liabilities
Current maturities of long-term debt	15,550	17,192
Current maturities of capital lease obligations	6,044	6,929
Accounts payable	82,329	67,921
Accrued compensation	25,975	18,212
Other current liabilities	23,703	19,851
Total current liabilities	153,601	130,105
Long-term debt	328,295	134,235
Capital lease obligations, less current maturities	7,509	8,364
Deferred income taxes	13,755	14,239
Other long-term liabilities	23,135	21,175
Total liabilities	526,295	308,118
Commitments and contingencies (Note 12)
Stockholders' equity
Preferred Stock; $0.01 par value: 5,000,000 authorized and 0 shares issued and outstanding at September 30, 2017 and December 31, 2016, respectively
Common Stock; $0.01 par value: 100,000,000 authorized, 32,524,934 and 32,135,176 issued and 31,862,561 and 31,484,774 shares outstanding at September 30, 2017 and December 31, 2016, respectively	325	321
Additional paid in capital	172,206	158,581
Retained earnings	37,641	7,294
Treasury Stock; at cost: 662,373 and 650,402 shares at September 30, 2017 and December 31, 2016, respectively	(12,769)	(12,219)
Accumulated other comprehensive loss	(45)
Total stockholders' equity	197,358	153,977
Total liabilities and stockholders' equity	$ 723,653	$ 462,095

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 4,846	$ 3,397
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	32,524,934	32,135,176
Common stock, shares outstanding	31,862,561	31,484,774
Treasury Stock	662,373	650,402

Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Net revenue	$ 295,193	$ 225,392	$ 833,058	$ 629,003
Cost of sales	209,612	158,132	590,377	444,909
Gross profit	85,581	67,260	242,681	184,094
Operating expenses
Selling	14,865	13,028	42,541	36,239
Administrative	41,657	31,504	122,679	92,677
Amortization	6,824	2,889	19,790	8,178
Operating income	22,235	19,839	57,671	47,000
Other expense
Interest expense	4,421	1,544	11,456	4,605
Other	83	23	366	248
Income before income taxes	17,731	18,272	45,849	42,147
Income tax provision	5,721	6,723	15,502	14,792
Net income	12,010	11,549	30,347	27,355
Other comprehensive income, net of tax:
Unrealized gain (loss) on cash flow hedge, net of tax (provision) benefit of ($21) and $30 for the three and nine months ended September 30, 2017, respectively	32		(45)
Comprehensive income	$ 12,042	$ 11,549	$ 30,302	$ 27,355
Basic and diluted net income per share	$ 0.38	$ 0.37	$ 0.96	$ 0.87
Weighted average shares outstanding:
Basic	31,659,503	31,323,600	31,632,400	31,294,596
Diluted	31,766,881	31,377,790	31,712,515	31,351,991

Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017
Income Statement [Abstract]
Unrealized gain (loss) on cash flow hedge, tax (provision) benefit	$ (21)	$ 30

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid In Capital [Member]	Accumulated Deficit / Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]
BALANCE at Dec. 31, 2015	$ 114,483	$ 320	$ 156,688	$ (31,142)	$ (11,383)
BALANCE, Shares at Dec. 31, 2015		31,982,888
BALANCE, Treasury Shares at Dec. 31, 2015					(616,560)
Net income	27,355			27,355
Issuance of Common Stock Awards to Employees, Value		$ 1	(1)
Issuance of Common Stock Awards to Employees, Shares		143,528
Surrender of Common Stock Awards by Employees, Value	(836)				$ (836)
Surrender of Common Stock Awards by Employees, Shares					(33,091)
Share-Based Compensation Expense	1,231		1,231
Share-Based Compensation issued to Directors, Value	300		300
Share-Based Compensation issued to Directors, Shares		8,760
BALANCE at Sep. 30, 2016	142,533	$ 321	158,218	(3,787)	$ (12,219)
BALANCE, Shares at Sep. 30, 2016		32,135,176
BALANCE, Treasury Shares at Sep. 30, 2016					(649,651)
BALANCE at Dec. 31, 2016	$ 153,977	$ 321	158,581	7,294	$ (12,219)
BALANCE, Shares at Dec. 31, 2016	32,135,176	32,135,176
BALANCE, Treasury Shares at Dec. 31, 2016	(650,402)				(650,402)
Net income	$ 30,347			30,347
Purchase of Remaining Interest in Subsidiary	(1,890)		(1,890)
Issuance of Common Stock for Acquisition, Value	10,859	$ 3	10,856
Issuance of Common Stock for Acquisition, Shares		282,577
Issuance of Common Stock Awards to Employees, Value		$ 1	(1)
Issuance of Common Stock Awards to Employees, Shares		101,241
Surrender of Common Stock Awards by Employees, Value	(550)				$ (550)
Surrender of Common Stock Awards by Employees, Shares					(11,971)
Share-Based Compensation Expense	4,360		4,360
Share-Based Compensation issued to Directors, Value	300		300
Share-Based Compensation issued to Directors, Shares		5,940
Other Comprehensive Loss, Net of Tax	(45)					$ (45)
BALANCE at Sep. 30, 2017	$ 197,358	$ 325	$ 172,206	$ 37,641	$ (12,769)	$ (45)
BALANCE, Shares at Sep. 30, 2017	32,524,934	32,524,934
BALANCE, Treasury Shares at Sep. 30, 2017	(662,373)				(662,373)

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities
Net income	$ 30,347	$ 27,355
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization of property and equipment	20,732	17,240
Amortization of intangibles	19,790	8,178
Amortization of deferred financing costs and debt discount	768	282
Provision for doubtful accounts	2,208	1,960
Write-off of debt issuance costs	1,201	286
Gain on sale of property and equipment	(329)	(218)
Noncash stock compensation	4,750	1,531
Deferred income taxes		708
Changes in assets and liabilities, excluding effects of acquisitions
Accounts receivable	(24,636)	(17,878)
Inventories	68	(3,158)
Other assets	695	4,727
Accounts payable	2,665	3,879
Income taxes payable/receivable	(10,167)	3,652
Other liabilities	5,249	6,033
Net cash provided by operating activities	53,341	54,577
Cash flows from investing activities
Purchases of investments	(25,195)
Purchases of property and equipment	(22,947)	(19,169)
Acquisitions of businesses, net of cash acquired of $247 and $0, respectively	(130,994)	(36,427)
Proceeds from sale of property and equipment	682	523
Other	(1,845)
Net cash used in investing activities	(180,299)	(55,073)
Cash flows from financing activities
Proceeds from revolving line of credit under credit agreement applicable to respective period (Note 5)		37,975
Payments on revolving line of credit under credit agreement applicable to respective period (Note 5)		(37,975)
Proceeds from term loan under credit agreement applicable to respective period (Note 5)	300,000	100,000
Payments on term loan under credit agreement applicable to respective period (Note 5)	(97,000)	(50,625)
Proceeds from delayed draw term loan under credit agreement applicable to respective period (Note 5)	112,500	12,500
Payments on delayed draw term loan under credit agreement applicable to respective period (Note 5)	(125,000)	(50,000)
Proceeds from vehicle and equipment notes payable	15,817	16,310
Debt issuance costs	(8,175)	(1,238)
Principal payments on long term debt	(7,201)	(4,055)
Principal payments on capital lease obligations	(5,583)	(6,596)
Acquisition-related obligations	(3,434)	(2,732)
Surrender of common stock awards by employees	(550)	(836)
Purchase of remaining interest in subsidiary	(1,890)
Net cash provided by financing activities	179,484	12,728
Net change in cash	52,526	12,232
Cash at beginning of period	14,482	6,818
Cash at end of period	67,008	19,050
Supplemental disclosures of cash flow information Net cash paid during the period for:
Interest	9,733	3,904
Income taxes, net of refunds	26,292	10,428
Supplemental disclosure of noncash investing and financing activities
Common stock issued for acquisition of business	10,859
Vehicles capitalized under capital leases and related lease obligations	4,073	2,956
Seller obligations in connection with acquisition of businesses	3,759	2,849
Unpaid purchases of property and equipment included in accounts payable	$ 1,108	$ 2,140

Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Statement of Cash Flows [Abstract]
Cash acquired, Net	$ 247	$ 0

Organization

9 Months Ended

Sep. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization

NOTE 1 – ORGANIZATION

Installed Building Products, Inc. (“IBP”), a Delaware corporation formed on October 28, 2011, and its wholly-owned subsidiaries (collectively referred to as the “Company” and “we,” “us” and “our”) primarily install insulation, waterproofing, fire-stopping, fireproofing, garage doors, rain gutters, shower doors, closet shelving and mirrors and other products for residential and commercial builders located in the continental United States. The Company operates in over 100 locations and its corporate office is located in Columbus, Ohio.

We have one operating segment and a single reportable segment. We offer our portfolio of services for new and existing single-family and multi-family residential and commercial building projects from our national network of branch locations. Commercial sales have increased primarily due to the acquisition of Trilok Industries, Inc., Alpha Insulation & Waterproofing, Inc. and Alpha Insulation & Waterproofing Company (collectively, “Alpha”). See Item 2, Management’s Discussion and Analysis of Financial Condition and Results of Operations, for more information. The following table sets forth the percentage of our net revenue by end market:


	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Residential		84	%		89	%		83	%		88	%
Commercial		16			11			17			12

		100	%		100	%		100	%		100	%

Significant Accounting Policies	9 Months Ended
Significant Accounting Policies	Sep. 30, 2017
Accounting Policies [Abstract]
Significant Accounting Policies	NOTE 2 – SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation and Principles of Consolidation The accompanying condensed consolidated financial statements include all of our wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated. The information furnished in the condensed consolidated financial statements includes normal recurring adjustments and reflects all adjustments which are, in the opinion of management, necessary for a fair presentation of the results of operations and statements of financial position for the interim periods presented. Certain information and footnote disclosures normally included in the consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and the rules and regulations of the Securities and Exchange Commission (the “SEC”) have been condensed or omitted pursuant to such rules and regulations. We believe that the disclosures are adequate to prevent the information presented from being misleading when read in conjunction with our consolidated financial statements and the notes thereto included in Part II, Item 8, Financial Statements and Supplementary Data, of our Annual Report on Form 10-K for the fiscal year ended December 31, 2016 (the “2016 Form 10-K”), as filed with the SEC on February 28, 2017. The December 31, 2016 condensed consolidated balance sheet data herein was derived from the audited financial statements but does not include all disclosures required by U.S. GAAP. Our interim operating results for the three and nine months ended September 30, 2017 are not necessarily indicative of the results to be expected in future operating quarters. See Item 1A, Risk Factors, in our 2016 Form 10-K for additional information regarding risk factors that may impact our results. Note 2 to the consolidated financial statements in our 2016 Form 10-K describes the significant accounting policies and estimates used in preparation of the consolidated financial statements. There have been no changes to our significant accounting policies during the three or nine months ended September 30, 2017 except in the areas of derivative and hedging activities, revenue and cost recognition, investments, accounts receivable, share-based compensation and use of estimates as described below. Accounting Policy for Derivative Instruments and Hedging Activities We record all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether we have elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the earnings effect of the hedged forecasted transactions in a cash flow hedge. We may enter into derivative contracts that are intended to economically hedge certain of our risk, even though hedge accounting does not apply or we elect not to apply hedge accounting. Revenue and Cost Recognition Revenue from the sale and installation of products is recognized when all of the following have occurred: (i) persuasive evidence of an arrangement exists; (ii) delivery has occurred or services have been rendered; (iii) the price is fixed or determinable; and (iv) the ability to collect is reasonably assured. We recognize revenue using either the completed contract method or the percentage-of-completion method of accounting, depending primarily on length of time required to complete the contract. The completed contract method is used for short-term contracts for which financial position and results of operations reported on the completed-contract basis would not vary materially from those resulting from use of the percentage-of-completion method. Revenue from the sale and installation of products is recognized net of adjustments and discounts and, for revenue using the completed contract method of accounting, at the time the installation is complete. When the percentage-of-completion method is used, we estimate the costs to complete individual contracts and record as revenue that portion of the total contract price which is considered complete based on the relationship of costs incurred to date to total anticipated costs. The costs of earned revenue include all direct material and labor costs and those indirect costs related to contract performance, such as indirect labor, supplies, tools and repairs. Provisions for estimated losses on uncompleted contracts are made in the period in which such losses are determined. Investment Policy Marketable securities with original maturities longer than three months but less than one year from the balance sheet date are classified as investments within current assets. These investments consist of highly liquid instruments including corporate bonds and commercial paper. Investments for which we have the ability and positive intent to hold to maturity are carried at amortized cost. The difference between the acquisition costs and face values of held-to-maturity investments is amortized over the remaining term of the investments and added to or subtracted from the acquisition cost and interest income. As of September 30, 2017, all of our investments were classified as held-to-maturity. Accounts Receivable We account for trade receivables based on amounts billed to customers. Past due receivables are determined based on contractual terms. We do not accrue interest on any of our trade receivables. Retainage receivables represent the amount retained by our customers to ensure the quality of the installation and is received after satisfactory completion of each installation project. Management regularly reviews aging of retainage receivables and changes in payment trends and records an allowance when collection of amounts due are considered not probable. Amounts retained by project owners under construction contracts and included in accounts receivable and other non-current assets were $22.1 million and $0.6 million as of September 30, 2017, respectively. Amounts retained by project owners under construction contracts and included in accounts receivable as of December 31, 2016 were $10.3 million. Share-Based Compensation Our share-based compensation program is designed to attract and retain employees while also aligning employees’ interests with the interests of our stockholders. Restricted stock awards are periodically granted to certain employees, officers and non-employee members of our board of directors under the stockholder-approved 2014 Omnibus Incentive Plan. Equity-based awards: Certain of our stock awards are deemed to be equity-based with a service condition and do not contain a market or performance condition with the exception of performance-based awards granted to certain officers and performance-based restricted stock units. Fair value of the non-performance-based awards to employees and officers is measured at the grant date and amortized to expense over the vesting period of the awards using the straight-line attribution method for all service-based awards with a graded vesting feature. This fair value is reduced by assumed forfeitures and adjusted for actual forfeitures until vesting. We also issue performance stock-based awards to certain officers under our 2014 Omnibus Incentive Plan. The performance-based compensation expense is recorded over the requisite service period using the graded-vesting method for the entire award. Performance-based stock awards are accounted for at fair value at date of grant. We also periodically grant restricted stock units to certain employees under the stockholder-approved 2014 Omnibus Incentive Plan. These units convert to shares upon meeting time- and performance-based requirements. Liability-based awards: Certain of our stock awards represent a predominately-fixed monetary amount that is to be settled with a variable number of shares. These awards contain both time and performance requirements, and are deemed to be liability-based, which requires that we re-measure to reflect the fair value at the end of each reporting period. The change in fair value each reporting period is recorded as compensation cost, with a corresponding increase or decrease in the share-based liability, either immediately or over the remaining service period depending on the vested status of the award. Compensation expense for both equity and liability-based restricted stock units is recorded based on an assessment each reporting period of the probability that certain performance goals will be met during the contingent vesting period. If performance goals are not probable of occurrence, no compensation expense will be recognized. If performance goals that were previously deemed probable are not or are not expected to be met, the previously recognized compensation cost related to such performance goals will be reversed. Employees and officers are subject to tax at the vesting date based on the market price of the shares on that date, or on the grant date if an election is made. Use of Estimates Preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates include the revenue, costs and reserves established under the percentage-of-completion method, allowance for doubtful accounts, valuation allowance on deferred tax assets, valuation of the reporting unit, intangible assets and other long-lived assets, share-based compensation, fair value of derivative instruments and reserves for general liability, workers’ compensation and medical insurance. Management believes the accounting estimates are appropriate and reasonably determined; however, due to the inherent uncertainties in making these estimates, actual amounts could differ from such estimates. Advertising Costs Advertising costs are generally expensed as incurred. Advertising expense was approximately $0.8 million and $2.4 million for the three and nine months ended September 30, 2017, respectively, and $0.8 million and $2.2 million for the three and nine months ended September 30, 2016, respectively, and is included in selling expense on the Condensed Consolidated Statements of Operations and Comprehensive Income. Recently Adopted Accounting Pronouncements In July 2015, the Federal Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2015-11, “Inventory (Topic 330).” This update requires an entity to measure inventory within the scope of the update at the lower of cost and net realizable value. For public business entities, this update is effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. This ASU did not have a material impact on our consolidated financial statements. In March 2016, the FASB issued ASU 2016-06, “Derivatives and Hedging (Topic 815): Contingent Put and Call Options in Debt Instruments.” This ASU clarifies the requirement for assessing whether contingent call/put options that can accelerate the payment of principal on debt instruments are clearly and closely related to their debt hosts. An entity performing the assessment under this amendment is required to assess the embedded call/put options solely in accordance with the four-step decision sequence. Consequently, when a call/put option is contingently exercisable, an entity does not have to assess whether the event that triggers the ability to exercise a call/put option is related to interest rates or credit risks. For public business entities, this update is effective for financial statements issued for fiscal years beginning after December 15, 2016 and interim periods within those fiscal years. This ASU did not have a material impact on our consolidated financial statements. In January 2017, the FASB issued ASU 2017-03, “Accounting Changes and Error Corrections (Topic 250) and Investments-Equity Method and Joint Ventures (Topic 323).” The portion of this ASU related to Topic 250 states that when a registrant does not know or cannot reasonably estimate the impact that future adoption of certain ASUs (ASU 2014-09, 2016-02 and 2016-13) are expected to have on the financial statements, then in addition to making a statement to that effect, that registrant should consider additional qualitative financial statement disclosures to assist the reader in assessing the significance of the impact that the standard will have on the financial statements of the registrant when adopted. We have included such disclosures for ASU 2014-09 but not for ASU 2016-02 or ASU 2016-13 since we have not yet performed sufficient analysis on future effects upon implementation of the new standards. We have concluded that the portion of this ASU related to Topic 323 is not applicable and, therefore, did not have a material impact on our consolidated financial statements. This ASU is effective upon issuance. Recently Issued Accounting Pronouncements Not Yet Adopted In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” ASU 2014-09 and related subsequently issued amendments set forth a new revenue recognition model that requires identifying the contract(s) with a customer, identifying the performance obligations in the contract, determining the transaction price, allocating the transaction price to the performance obligations and recognizing the revenue upon satisfaction of performance obligations. In July 2015, the FASB voted to defer the application of the provisions of this standard for public companies until annual reporting periods beginning after December 15, 2017, including interim periods within those reporting periods. We have substantially completed our assessment on the applicability of the standard on accounting for contracts with customers with the exception of certain 2017 business combinations which we are currently assessing. The standard is expected to result in the disaggregation of certain of our insulation contracts into multiple separately identifiable performance obligations as well as additional revenue recognition disclosures. Under current accounting standards, we consider the installation service to represent one performance obligation, whereas in accordance with this ASU, we have identified multiple phases to certain of our insulation projects that should be considered separate performance obligations. Currently, we intend to adopt the new standard using the modified retrospective approach, which would allow us to recognize the cumulative effect of initially applying the standard as an adjustment to the opening balance of retained earnings. In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842).” This update amends the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets and making targeted changes to lessor accounting. ASU 2016-02 requires a modified retrospective transition approach for all leases existing at, or entered into after, the date of initial application, with an option to use certain transition relief. For public business entities, this update is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those fiscal years, and early adoption is permitted as of the standard’s issuance date. We are evaluating whether this ASU will have a material impact on our consolidated financial statements. In May 2016, the FASB issued ASU No. 2016-11, “Revenue Recognition (Topic 605) and Derivatives and Hedging (Topic 815): Rescission of SEC Guidance Because of Accounting Standards Updates 2014-09 and 2014-16 pursuant to Staff announcements at the March 3, 2016 EITF Meeting.” This ASU rescinds from the FASB Accounting Standards Codification certain SEC paragraphs as a result of two SEC Staff Announcements at the March 3, 2016 meeting. For public entities, the amendments related to Topic 605 are effective for interim and annual reporting periods beginning after December 15, 2017 and amendments related to Topic 815 are effective for interim and annual reporting periods beginning after December 15, 2015. We have evaluated the applicability of this ASU and have determined it will not have a material impact on our consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” This ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. In addition, these amendments require the measurement of all expected credit losses for financial assets, including trade accounts receivable, held at the reporting date based on historical experience, current conditions and reasonable and supportable forecasts. For public business entities, this update is effective for financial statements issued for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. We are evaluating whether this ASU will have a material impact on our consolidated financial statements. In August 2016, the FASB issued ASU 2016-15, “Statement of Cash Flows: Clarification of Certain Cash Receipts and Cash Payments (Topic 230).” This ASU addresses the diversity in practice related to the classification of certain cash receipts and payments in the statement of cash flows by adding or clarifying guidance on eight specific cash flow issues. We have determined that this update addresses one issue that specifically impacts us, which is the classification of contingent consideration payments made after a business combination, and we are evaluating whether it will have a material impact on our consolidated financial statements. For public business entities, this update is effective for financial statements issued for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. In October 2016, the FASB issued ASU 2016-16, “Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other than Inventory.” This ASU aligns the recognition of income tax consequences for intra-entity transfers of assets other than inventory with International Financial Reporting Standards (“IFRS”). For public business entities, this update is effective for financial statements issued for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. We have evaluated the applicability of this ASU and have determined it will not have a material impact on our consolidated financial statements. In November 2016, the FASB issued ASU No. 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash.” This ASU provides guidance on the presentation of restricted cash or restricted cash equivalents in the statement of cash flows. This standard is effective for interim and annual reporting periods beginning after December 15, 2017. We will adopt this standard effective January 1, 2018 as we expect it to be applicable to us at that time. In January 2017, the FASB issued ASU 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business.” This ASU clarifies the definition of a business to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. For public business entities, this update is effective for financial statements issued for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. We have evaluated the applicability of this ASU and have determined it will not have a material impact on our consolidated financial statements. In May 2017, the FASB issued ASU 2017-09, “Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting.” This ASU provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. The amendments should be applied prospectively to an award modified on or after the adoption date. For public business entities, this update is effective for financial statements issued for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted. We have evaluated the applicability of this ASU and have determined it will not have a material impact on our consolidated financial statements. In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.” This ASU better aligns a company’s risk management activities and financial reporting for hedging relationships and makes certain improvements to simplify the application of hedge accounting guidance. For public business entities, this update is effective for financial statements issued for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. We are evaluating whether this ASU will have a material impact on our consolidated financial statements.

Investments	9 Months Ended
Investments	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Investments	NOTE 3 – INVESTMENTS Cash and cash equivalents includes investments in money market funds that are valued based on the net asset value of the funds. The cash equivalents consist primarily of money market funds that are Level 1 measurements. The investments in these funds were $58.8 million as of September 30, 2017. We had no such investments as of December 31, 2016. All other investments are classified as held-to-maturity and consist of highly liquid instruments including corporate bonds and commercial paper. As of September 30, 2017, the amortized cost of these investments equaled the net carrying value, which was $25.1 million. We had no such investments as of December 31, 2016. All held-to-maturity securities as of September 30, 2017 mature in one year or less and are Level 2 measurements. See Note 7, Fair Value Measurements, for additional information.

Goodwill and Intangibles

9 Months Ended

Sep. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangibles

NOTE 4 – GOODWILL AND INTANGIBLES

Goodwill

The change in carrying amount of goodwill was as follows (in thousands):


	Goodwill (Gross)		Accumulated Impairment Losses			Goodwill (Net)
January 1, 2017	$	177,090	$	(70,004	)	$	107,086
Business Combinations		46,059		—			46,059
Other		515		—			515

September 30, 2017	$	223,664	$	(70,004	)	$	153,660

Other changes included in the above table represent minor adjustments for the allocation of certain acquisitions still under measurement and three immaterial acquisitions completed during the nine months ended September 30, 2017.

We test goodwill for impairment annually during the fourth quarter of our fiscal year or earlier if there is an impairment indicator. No impairment was recognized during either of the nine month periods ended September 30, 2017 and 2016.

Intangibles, net

The following table provides the gross carrying amount and accumulated amortization for each major class of intangibles (in thousands):


	As of September 30, 2017						As of December 31, 2016
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Amortized intangibles:
Customer relationships	$	118,448	$	35,560	$	82,888	$	80,909	$	27,533	$	53,376
Covenants not-to-compete		11,581		4,139		7,442		8,602		2,466		6,136
Trademarks and trade names		56,781		13,097		43,684		37,303		10,498		26,805
Backlog		13,400		6,700		6,700		—		—		—

	$	200,210	$	59,496	$	140,714	$	126,814	$	40,497	$	86,317

The gross carrying amount of intangibles increased approximately $73.4 million during the nine months ended September 30, 2017 primarily due to business combinations. See Note 13, Business Combinations, for more information. Remaining estimated aggregate annual amortization expense is as follows (amounts, in thousands, are for the fiscal year ended):


Remainder of 2017	$	6,916
2018		22,983
2019		17,928
2020		17,212
2021		16,194
Thereafter		59,481

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Long-Term Debt

9 Months Ended

Sep. 30, 2017

Debt Disclosure [Abstract]

Long-Term Debt

NOTE 5 – LONG-TERM DEBT

Debt consisted of the following (in thousands):


	As of September 30,			As of December 31,
	2017			2016
Term loans under agreements applicable to respective period, in effect, net of unamortized original issue discount and debt issuance costs of $6,184 and $447, respectively	$	293,066		$	95,803
Delayed draw term loans, in effect, net of unamortized debt issuance costs of $0 and $50, respectively		—			12,450
Vehicle and equipment notes, maturing June 2022 to September 2022; payable in various monthly installments, including interest rates ranging from 2% to 4%		46,713			38,186
Various notes payable, maturing through March 2025; payable in various installments, including interest rates ranging from 4% to 6%		4,066			4,988

		343,845			151,427
Less: current maturities		(15,550	)		(17,192	)

Long-term debt, less current maturities	$	328,295		$	134,235

Senior Secured Credit Agreements

On April 13, 2017, we entered into a term loan credit agreement (the “Term Loan Agreement”) which provides for a seven-year $300.0 million term loan facility (the “Term Loan”) and an asset-based lending credit agreement (the “ABL Credit Agreement” and together with the Term Loan Agreement, the “Senior Secured Credit Agreements”) which provides for up to approximately $100.0 million with a sublimit up to $50.0 million for the issuance of letters of credit (the “ABL Revolver” and together with the Term Loan, the “Senior Secured Facilities”), which may be reduced or increased pursuant to the ABL Credit Agreement. The borrowing base for the ABL Revolver, which determines availability under the facility, is based on a percentage of the value of certain assets securing the obligations of the Company and the subsidiary guarantors under the ABL Credit Agreement.

Proceeds from the Senior Secured Credit Facilities were used to repay in full all amounts outstanding under the credit and security agreement, dated as of February 29, 2016, by and among the Company and the lenders named therein (the “Credit and Security Agreement”).

The Term Loan amortizes in quarterly principal payments of approximately $0.8 million starting on September 30, 2017, with any remaining unpaid balances due on April 15, 2024, which is the maturity date. Loans incurred under the ABL Revolver will have a final maturity of April 13, 2022.

Subject to certain exceptions, the Term Loan will be subject to mandatory pre-payments equal to (i) 100% of the net cash proceeds from issuances or incurrence of debt by the Company or any of its restricted subsidiaries (other than with respect to certain permitted indebtedness); (ii) 100% of the net cash proceeds from certain sales or dispositions of assets by the Company or any of its restricted subsidiaries in excess of a certain amount and subject to customary reinvestment provisions and certain other expenses; and (iii) 50% (with step-downs to 25% and 0% based upon achievement of specified net leverage ratios) of excess cash flow of the Company and its restricted subsidiaries in excess of $5.0 million, subject to customary exceptions and limitations.

Loans under the Senior Secured Credit Facilities bear interest based on, at the Company’s election, either the base rate or the Eurodollar rate plus, in each case, an applicable margin (the “Applicable Margin”). The Applicable Margin in respect of loans under (i) the Term Loan Agreement will be (A) 3.00% in the case of Eurodollar rate loans and (B) 2.00% in the case of base rate loans, and (ii) the ABL Facility will be (A) 1.25%, 1.50% or 1.75% in the case of Eurodollar rate loans (based on a measure of availability under the ABL Facility) and (B) 0.25%, 0.50% or 0.75% in the case of base rate loans (based on a measure of availability under the ABL Facility).

In addition, we will pay customary commitment fees and letter of credit fees under the ABL Credit Agreement. The commitment fees will vary based upon a measure of our utilization under the ABL Revolver.

The Senior Secured Credit Agreements each contain a number of customary affirmative and negative non-financial covenants, and the ABL Credit Agreement also contains a financial covenant requiring the satisfaction of a minimum fixed charge coverage ratio of 1.00 to 1.00 in the event that we do not meet a minimum measure of availability under the ABL Revolver.

Vehicle and Equipment Notes

We are party to a Master Loan and Security Agreement (“Master Loan and Security Agreement”), a Master Equipment Lease Agreement (“Master Equipment Agreement”) and one or more Master Loan Agreements (“Master Loan Agreements”) with various lenders to provide financing for the purpose of purchasing or leasing vehicles and equipment used in the normal course of business. Each financing arrangement under these agreements constitutes a separate note and obligation. Vehicles and equipment purchased or leased under each financing arrangement serve as collateral for the note applicable to such financing arrangement. Regular payments are due under each note for a period of typically 60 consecutive months after the incurrence of the obligation. The specific terms of each note are based on specific criteria, including the type of vehicle or equipment and the market interest rates at the time. No termination date applies to these agreements.

Total gross assets relating to our master loan and equipment agreements were $66.8 million and $48.7 million as of September 30, 2017 and December 31, 2016, respectively, none of which were fully depreciated as of September 30, 2017 or December 31, 2016, respectively. The net book value of assets under these agreements was $47.3 million and $38.0 million as of September 30, 2017 and December 31, 2016, respectively. Depreciation of assets held under these agreements is included within cost of sales on the Condensed Consolidated Statements of Operations and Comprehensive Income.

Costs and Estimated Earnings on Uncompleted Contracts

9 Months Ended

Sep. 30, 2017

Contractors [Abstract]

Costs and Estimated Earnings on Uncompleted Contracts

NOTE 6 – COSTS AND ESTIMATED EARNINGS ON UNCOMPLETED CONTRACTS

Uncompleted contracts were as follows for the nine months ended September 30 (in thousands):


	2017
Costs incurred on uncompleted contracts	$	70,403
Estimated earnings		38,691

Total		109,094
Less: Billings to date		108,798

Net under (over) billings	$	296

Net under (over) billings were as follows as of September 30 (in thousands):


	2017
Costs and estimated earnings in excess of billings on uncompleted contracts	$	5,323
Billings in excess of costs and estimated earnings on uncompleted contracts		(5,027	)

Net under (over) billings	$	296

The asset, costs and estimated earnings in excess of billings on uncompleted contracts, represents revenues recognized in excess of amounts billed and is included in other current assets in our Condensed Consolidated Balance Sheets. The liability, billings in excess of costs and estimated earnings on uncompleted contracts, represents billings in excess of revenues recognized and is included in other current liabilities in our Condensed Consolidated Balance Sheets.

Fair Value Measurements

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Fair Value Measurements

NOTE 7 – FAIR VALUE MEASUREMENTS

Fair Values

Fair value is the price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date.

ASC 820, “Fair Value Measurement,” establishes a fair value hierarchy that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair value:

Level 1: Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date.

Level 2: Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.

Level 3: Significant unobservable inputs that reflect a reporting entity’s own assumptions about the assumptions that market participants would use in pricing an asset or liability.

Estimated Fair Value of Financial Instruments

Accounts receivable, accounts payable and accrued liabilities as of September 30, 2017 and December 31, 2016 approximate fair value due to the short-term maturities of these financial instruments. The carrying amounts of our long-term debt, including the Term Loan and ABL Revolver as of September 30, 2017 and the term loan, delayed draw term loan and revolving line of credit as of December 31, 2016, approximate fair value due to the variable rate nature of the agreements. The carrying amounts of the obligations associated with our capital leases and vehicle and equipment notes approximate fair value as of September 30, 2017 and December 31, 2016 because we have incurred the obligations within recent fiscal years when the interest rate markets have been low and stable. All debt classifications represent Level 2 fair value measurements.

The fair values of financial assets and liabilities were as follows as of September 30 (in thousands):


	Fair value as of September 30, 2017
	Total		Level 1		Level 2		Level 3
Financial assets:
Cash equivalents	$	58,825	$	58,825	$	—	$	—
Investments		25,106		—		25,106		—

Total financial assets	$	83,931	$	58,825	$	25,106	$	—

Financial liabilities:
Derivative financial instruments, net of tax	$	45	$	—	$	45	$	—

We had no such items upon which to report fair value as of December 31, 2016. See Note 3, Investments, for more information on cash equivalents and investments included in the table above. Also see Note 8, Derivatives and Hedging Activities, for more information on derivative financial instruments.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Derivatives and Hedging Activities	9 Months Ended
Derivatives and Hedging Activities	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	NOTE 8 – DERIVATIVES AND HEDGING ACTIVITIES Risk Management Objective of Using Derivatives We are exposed to certain risks arising from both our business operations and economic conditions. We manage exposure to a wide variety of business and operational risks through our core business activities. We manage economic risks, including interest rate, liquidity and credit risk primarily by overseeing the amount, sources and duration of debt funding and the use of derivative financial instruments. Specifically, we have entered into derivative financial instruments to manage exposure to interest rate movements that result in the receipt or payment of future known and uncertain cash amounts, the value of which are determined by interest rates. Our derivative financial instruments are used to manage differences in the amount, timing and duration of our known or expected cash receipts and known or expected cash payments principally related to our investments and borrowings. Cash Flow Hedges of Interest Rate Risk Our purpose for using interest rate derivatives is to add stability to interest expense and to manage our exposure to interest rate movements. To accomplish these objectives, we primarily use interest rate swaps as part of our interest rate risk management strategy. Interest rate swaps designated as cash flow hedges involve the receipt of variable amounts from a counterparty in exchange for making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. As of September 30, 2017, we have two interest rate swaps with a beginning notional of $100.0 million that amortize quarterly to $95.3 million at a maturity date of May 31, 2022. The effective portion of changes in the fair value of derivatives designated and that qualify as cash flow hedges is recorded in accumulated other comprehensive income and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. During 2017, such derivatives were used to hedge the variable cash flows associated with existing variable-rate debt. The ineffective portion of the change in fair value of the derivatives, when present, is recognized directly in earnings. During the nine months ended September 30, 2017, we did not record any hedge ineffectiveness in earnings. Amounts reported in accumulated other comprehensive income related to derivatives will be reclassified to interest expense as interest payments are made on our variable-rate debt. Over the next twelve months, we estimate that an additional $0.5 million will be reclassified as an increase to interest expense. Additionally, we do not use derivatives for trading or speculative purposes and we currently do not have any derivatives that are not designated as hedges. As of September 30, 2017, the Company has not posted any collateral related to these agreements.

Employee Benefits

9 Months Ended

Sep. 30, 2017

Postemployment Benefits [Abstract]

Employee Benefits

NOTE 9 – EMPLOYEE BENEFITS

Healthcare

Our healthcare benefit expense (net of employee contributions) for all plans was approximately $4.1 million and $3.7 million for the three months ended September 30, 2017 and 2016, respectively, and $12.4 million and $11.4 million for the nine months ended September 30, 2017 and 2016, respectively. An accrual for estimated healthcare claims incurred but not reported (“IBNR”) is included within accrued compensation on the Condensed Consolidated Balance Sheets and was $1.9 million and $1.7 million as of September 30, 2017 and December 31, 2016, respectively.

Workers’ Compensation

Workers’ compensation expense totaled $3.1 million and $3.4 million for the three months ended September 30, 2017 and 2016, respectively, and $9.8 million and $9.2 million for the nine months ended September 30, 2017 and 2016, respectively. Workers’ compensation known claims and IBNR reserves included on the Condensed Consolidated Balance Sheets were as follows (in thousands):


	September 30, 2017		December 31, 2016
Included in other current liabilities	$	4,913	$	4,595
Included in other long-term liabilities		8,837		7,052

	$	13,750	$	11,647

We also had an insurance receivable for claims that exceeded the stop loss limit included on the Condensed Consolidated Balance Sheets. That receivable offsets an equal liability included within other long-term liabilities noted above and was as follows (in thousands):


	September 30, 2017		December 31, 2016
Included in other non-current assets	$	1,828	$	1,249

Share-Based Compensation

Directors

During the nine months ended September 30, 2017 and 2016, we granted approximately six thousand and nine thousand shares of our common stock, respectively, under our 2014 Omnibus Incentive Plan to non-employee members of our Board of Directors. Accordingly, for the nine months ended September 30, 2017 and 2016, we recorded $0.3 million in compensation expense within administrative expenses on the Condensed Consolidated Statements of Operations and Comprehensive Income at the time of the grant.

Employees – Common Stock Awards

During the nine months ended September 30, 2017, we granted approximately 0.1 million shares of our common stock under our 2014 Omnibus Incentive Plan to our employees, which vest in three equal installments (rounded to the nearest whole share) on each of April 20, 2018, April 20, 2019 and April 20, 2020. These awards have a time-based requirement but are not classified as performance-based.

During the nine months ended September 30, 2017, our employees surrendered approximately ten thousand shares of our common stock to satisfy tax withholding obligations arising in connection with the vesting of common stock awards issued under our 2014 Omnibus Incentive Plan. Share-based compensation expense associated with common stock awards was $0.8 million and $1.9 million for the three and nine months ended September 30, 2017, respectively, and $0.4 million and $1.2 million for the three and nine months ended September 30, 2016, respectively. We recognized excess tax benefits of $0.6 million and $0.3 million within the income tax provision in the Condensed Consolidated Statements of Operations and Comprehensive Income for the nine months ended September 30, 2017 and 2016, respectively. We did not recognize any such excess tax benefits in the three months ended September 30, 2017 or 2016.

As of September 30, 2017, there was $6.2 million of unrecognized compensation expense related to these nonvested common stock awards. This expense is subject to future adjustments for forfeitures and is expected to be recognized on a straight-line basis over the remaining weighted-average period of 2.2 years. Shares forfeited are returned as treasury shares and available for future issuances. See the table below for changes in shares and related weighted average fair market value per share.

Employees – Performance-Based Stock Awards

During the nine months ended September 30, 2017, we established, and our Board of Directors approved, performance-based targets in connection with common stock awards to be issued to certain officers in 2018 contingent upon achievement of these targets. Share-based compensation expense associated with these performance-based awards was $0.3 million and $0.7 million for the three and nine months ended September 30, 2017, respectively.

As of September 30, 2017, there was $2.4 million of unrecognized compensation expense related to nonvested performance-based common stock awards. This expense is subject to future adjustments for forfeitures and is expected to be recognized over the remaining weighted-average period of 2.1 years using the graded-vesting method. See the table below for changes in shares and related weighted average fair market value per share.

Employees – Performance-Based Restricted Stock Units

During the nine months ended September 30, 2017, we established, and our Board of Directors approved, performance-based restricted stock units in connection with common stock awards to be issued to certain employees in 2018 contingent upon achievement of a performance target. These units will be accounted for as equity-based awards that will be settled with a fixed number of common shares. Share-based compensation expense associated with these performance-based awards was $1.0 million and $1.7 million for the three and nine months ended September 30, 2017, respectively.

As of September 30, 2017, there was $2.1 million of unrecognized compensation expense related to nonvested performance-based common stock units. This expense is subject to future adjustments for forfeitures and is expected to be recognized on a straight-line basis over the remaining weighted-average period of 0.6 years. See the table below for changes in shares and related weighted average fair market value per share.

In addition, during the three months ended September 30, 2017, we established, and our Board of Directors approved, performance-based restricted stock units in connection with common stock awards to be issued to certain employees between 2018 and 2022 contingent upon achievement of certain performance targets. These units will be accounted for as liability-based awards since they represent a predominantly-fixed monetary amount that will be settled with a variable number of common shares and as such are included in other long-term liabilities on the Condensed Consolidated Balance Sheets. Share-based compensation expense associated with these performance-based awards was $0.1 million for the three and nine months ended September 30, 2017. The unrecognized compensation expense associated with the liability-based awards is subject to fair value adjustment each reporting period, and is expected to be recognized on a straight-line basis over the remaining vesting period of 4.25 years.

Share-Based Compensation Summary

Amounts for each category of equity-based award for employees as of December 31, 2016 and changes during the nine months ended September 30, 2017 were as follows:


	Common Stock Awards					Performance-Based Stock Awards				Performance-Based Restricted Stock Units
	Awards			Weighted Average Fair Market Value Per Share		Awards		Weighted Average Fair Market Value Per Share		Units			Weighted Average Fair Market Value Per Share
Nonvested awards/units at December 31, 2016		161,174		$	26.36		—	$	—		—		$	—
Granted		101,241			52.00		77,254		41.00		73,880			52.00
Vested		(57,816	)		26.30		—		—		—			—
Forfeited/Cancelled		(1,541	)		36.33		—		—		(475	)		52.00

Nonvested awards/units at September 30, 2017		203,058		$	39.09		77,254	$	41.00		73,405		$	52.00

As of September 30, 2017, approximately 2.6 million shares of common stock were available for issuance under the 2014 Omnibus Incentive Plan.

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 10 – INCOME TAXES Our provision for income taxes as a percentage of pretax earnings is based on a current estimate of the annual effective income tax rate adjusted to reflect the impact of discrete items. During the three and nine months ended September 30, 2017, the effective tax rate was 32.3% and 33.8%, respectively. These rates were favorably impacted by deductions related to domestic production activities, usage of net operating losses for a tax filing entity which previously had a full valuation allowance, excess tax benefits from share-based compensation arrangements and the statute expiring for various uncertain tax positions. The favorable impact was partially offset by the tax effect of losses incurred by separate companies to which no benefit can be recognized due to a full valuation allowance against the losses.

Related Party Transactions

9 Months Ended

Sep. 30, 2017

Related Party Transactions

NOTE 11 – RELATED PARTY TRANSACTIONS

We sell installation services to other companies related to us through common or affiliated ownership and/or Board of Directors and/or management relationships. We also purchase services and materials and pay rent to companies with common or affiliated ownership.

We lease our headquarters and certain other facilities from related parties. See Note 12, Commitments and Contingencies, for future minimum lease payments to be paid to these related parties.

For the three and nine months ended September 30, 2017 and 2016, the amount of sales to related parties as well as the purchases from and rent expense paid to related parties were as follows (in thousands):


	Three months ended September 30,				Nine months ended September 30,
	2017		2016		2017		2016
Sales	$	2,641	$	2,182	$	7,363	$	5,282
Purchases		302		114		901		370
Rent		290		163		875		472

As of September 30, 2017 and December 31, 2016, we had related party balances of approximately $2.0 million and $1.5 million, respectively, included in accounts receivable on our Condensed Consolidated Balance Sheets. These balances primarily represent trade accounts receivable arising during the normal course of business with various related parties. M/I Homes, Inc., a customer whose Chairman, President and Chief Executive Officer is a member of our Board of Directors, accounted for $1.0 million and $0.8 million of these balances as of September 30, 2017 and December 31, 2016, respectively.

Commitments and Contingencies

9 Months Ended

Sep. 30, 2017

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

NOTE 12 – COMMITMENTS AND CONTINGENCIES

Accrued General Liability

Accrued general insurance reserves included on the Condensed Consolidated Balance Sheets were as follows (in thousands):


	September 30, 2017		December 31, 2016
Included in other current liabilities	$	2,069	$	1,949
Included in other long-term liabilities		7,627		7,104

	$	9,696	$	9,053

We also had insurance receivables included on the Condensed Consolidated Balance Sheets that, in aggregate, offset an equal liability included within the reserve amounts noted above. The amounts were as follows (in thousands):


	September 30, 2017		December 31, 2016
Insurance receivable and indemnification asset for claims under a fully insured policy	$	2,773	$	2,773
Insurance receivable for claims that exceeded the stop loss limit		2		26

Total insurance receivables included in other non-current assets	$	2,775	$	2,799

Leases

We are obligated under capital leases covering vehicles and certain equipment. The vehicle and equipment leases generally have initial terms ranging from four to six years. Total gross assets relating to capital leases were approximately $64.2 million and $64.2 million as of September 30, 2017 and December 31, 2016, respectively, and a total of approximately $23.7 million and $22.8 million were fully depreciated as of September 30, 2017 and December 31, 2016, respectively. The net book value of assets under capital leases was approximately $14.4 million and $16.4 million as of September 30, 2017 and December 31, 2016, respectively. Amortization of assets held under capital leases is included within cost of sales on the Condensed Consolidated Statements of Operations and Comprehensive Income.

We also have several noncancellable operating leases, primarily for buildings, improvements, equipment and certain vehicles. These leases generally contain renewal options for periods ranging from one to five years and require us to pay all executory costs such as property taxes, maintenance and insurance.

Future minimum lease payments under noncancellable operating leases (with initial or remaining lease terms in excess of one year) with related parties as of September 30, 2017 are as follows (in thousands):


Remainder of 2017	$	295
2018		988
2019		829
2020		566
2021		583
Thereafter		600

Other Commitments and Contingencies

From time to time, various claims and litigation are asserted or commenced against us principally arising from contractual matters and personnel and employment disputes. In determining loss contingencies, management considers the likelihood of loss as well as the ability to reasonably estimate the amount of such loss or liability. An estimated loss is recorded when it is considered probable that such a liability has been incurred and when the amount of loss can be reasonably estimated. As litigation is subject to inherent uncertainties, we cannot be certain that we will prevail in these matters. However, we do not believe that the ultimate outcome of any pending matters will have a material adverse effect on our consolidated financial position, results of operations or cash flows.

Business Combinations

9 Months Ended

Sep. 30, 2017

Business Combinations [Abstract]

Business Combinations

NOTE 13 – BUSINESS COMBINATIONS

As part of our ongoing strategy to increase market share in certain markets, we completed seven business combinations during the nine months ended September 30, 2017 and six business combinations during the nine months ended September 30, 2016 in which we acquired 100% of the voting equity interests in each. The largest of these acquisitions were Alpha, Columbia Shelving & Mirror Inc. and Charleston Shelving & Mirror, Inc. (collectively, “Columbia”) and All In Insulation, LLC d/b/a Astro Insulation (collectively, “Astro”). The remaining acquisitions were individually insignificant but material in the aggregate, as follows (in thousands):


									Fair Value		Total		Three months ended September 30, 2017					Nine months ended September 30, 2017
2017 Acquisitions	Date		Acquisition Type		Cash Paid		Seller Obligations		of Common Stock Issued		Purchase Price		Revenue		Net (Loss) Income			Revenue		Net Income (Loss)
Alpha(1)		1/5/2017		Share	$	103,810	$	2,002	$	10,859	$	116,671	$	29,334	$	(271	)	$	87,830	$	190
Columbia		6/26/2017		Asset		8,768		225		—		8,993		3,026		73			3,241		80
Astro		9/18/2017		Asset		8,851		490		—		9,341		264		46			264		46
Other		Various		Asset		9,812		1,042		—		10,854		6,499		84			11,671		366

Total					$	131,241	$	3,759	$	10,859	$	145,859	$	39,123	$	(68	)	$	103,006	$	682

(1)

The cash paid included $21.7 million in contingent consideration to satisfy purchase price adjustments related to cash and net working capital requirements, earnout consideration based on Alpha’s change in EBITDA from 2015 and a customary holdback. We issued 282,577 shares of our common stock with a fair value of $10.9 million.


											Three months ended September 30, 2016					Nine months ended September 30, 2016
2016 Acquisitions	Date		Acquisition Type		Cash Paid		Seller Obligations		Total Purchase Price		Revenue		Net Income (Loss)			Revenue		Net Income (Loss)
Alpine Insulation Co., Inc.		4/12/2016		Asset	$	21,151	$	1,560	$	22,711	$	7,957	$	806		$	14,734	$	1,238
Other		Various		Asset		15,276		1,289		16,565		5,519		(200	)		12,283		(664	)

Total					$	36,427	$	2,849	$	39,276	$	13,476	$	606		$	27,017	$	574

Acquisition-related costs recorded within administrative expenses on the Condensed Consolidated Statements of Operations and Comprehensive Income amounted to $0.9 million and $0.5 million for the three months ended September 30, 2017 and 2016, respectively, and $2.3 million and $1.3 million for the nine months ended September 30, 2017 and 2016, respectively. The goodwill recognized in conjunction with these business combinations is attributable to expected improvement in the business of these acquired companies. We expect to deduct approximately $45.6 million of goodwill for tax purposes as a result of 2017 acquisitions.

Purchase Price Allocations

The estimated fair values of the assets acquired and liabilities assumed for the acquisitions, as well as total purchase prices and cash paid, approximated the following as of September 30, 2017 and 2016 and may be adjusted during the valuation period since acquisition (in thousands):


	2017															2016
	Alpha			Columbia			Astro			Other			Total			Alpine			Other			Total
Estimated fair values:
Cash	$	247		$	—		$	—		$	—		$	247		$	—		$	—		$	—
Accounts receivable		30,361			990			924			2,137			34,412			3,959			2,080			6,039
Inventories		1,851			704			296			1,014			3,865			700			888			1,588
Other current assets		4,827			8			36			8			4,879			—			12			12
Property and equipment		1,528			659			640			1,144			3,971			656			1,188			1,844
Intangibles		57,100			4,760			4,966			5,939			72,765			12,800			8,492			21,292
Goodwill		38,679			2,211			2,808			2,361			46,059			6,642			5,270			11,912
Other non-current assets		150			31			—			191			372			—			94			94
Accounts payable and other current liabilities		(18,072	)		(370	)		(329	)		(1,940	)		(20,711	)		(2,046	)		(1,459	)		(3,505	)

Fair value of assets acquired and purchase price		116,671			8,993			9,341			10,854			145,859			22,711			16,565			39,276
Less fair value of common stock issued		10,859			—			—			—			10,859			—			—			—
Less seller obligations		2,002			225			490			1,042			3,759			1,560			1,289			2,849

Cash paid	$	103,810		$	8,768		$	8,851		$	9,812		$	131,241		$	21,151		$	15,276		$	36,427

Further adjustments to the allocation for each acquisition still under its measurement period are expected as third-party and internal valuations are finalized, certain tax aspects of the transaction are completed and customary post-closing reviews are concluded during the measurement period attributable to each individual business combination. As a result, insignificant adjustments to the fair value of assets acquired, and in some cases total purchase price, have been made to certain business combinations since the date of acquisition and future adjustments may be made through the end of each measurement period. Goodwill and intangibles per the above table do not agree to the total gross increases of these assets as shown in Note 4, Goodwill and Intangibles, during the nine months ended September 30, 2017 due to minor adjustments to goodwill for the allocation of certain acquisitions still under measurement as well as other immaterial intangible assets added and written off during the ordinary course of business. In addition, goodwill and intangibles increased during the nine months ended September 30, 2017 due to three immaterial tuck-in acquisitions that do not appear in the above table.

The provisional amounts for Alpha originally reported in our Condensed Consolidated Balance Sheets included in our Quarterly Report on Form 10-Q for the period ended March 31, 2017 were adjusted to reflect the review and ongoing analysis of the fair value measurements. As a result of our continued evaluation during the measurement period, we increased goodwill by approximately $2.2 million, offset by a corresponding net reduction in various working capital accounts.

The provisional amounts for Columbia originally reported in our Condensed Consolidated Balance Sheets included in our Quarterly Report on Form 10-Q for the period ended June 30, 2017 were adjusted to reflect the review and ongoing analysis of the fair value measurements. As a result of an independent appraisal, we increased goodwill by approximately $0.5 million and our seller obligations by approximately $0.4 million for an adjustment to the fair value of a working capital contingent liability. These adjustments, as well as various other insignificant adjustments, resulted in a total purchase price increase for Columbia of approximately $0.6 million as reflected within the above table and were within applicable measurement period guidelines.

Estimates of acquired intangible assets related to the acquisitions are as follows for the nine months ended September 30 (dollars in thousands):


	2017				2016
Acquired intangibles assets	Estimated Fair Value		Weighted Average Estimated Useful Life (yrs.)		Estimated Fair Value		Weighted Average Estimated Useful Life (yrs.)
Customer relationships	$	37,533		8	$	12,862		9
Trademarks and trade names		19,403		15		6,116		15
Non-competition agreements		2,429		5		2,315		5
Backlog		13,400		1.5		—		—

Pro Forma Information

The unaudited pro forma information for the combined results of the Company has been prepared as if the 2017 acquisitions had taken place on January 1, 2016 and the 2016 acquisitions had taken place on January 1, 2015. The unaudited pro forma information is not necessarily indicative of the results that we would have achieved had the transactions actually taken place on January 1, 2016 and 2015, respectively, and the unaudited pro forma information does not purport to be indicative of future financial operating results. See Note 12, Business Combinations, to our audited financial statements in Item 8 of Part II of our 2016 Form 10-K for additional information on 2016 acquisitions included in the table below (in thousands, except per share data):


	Pro forma for the three months ended September 30,				Pro forma for the nine months ended September 30,
	2017		2016		2017		2016
Net revenue	$	297,820	$	272,010	$	853,897	$	771,313
Net income		11,836		12,328		31,544		32,117
Basic net income per share		0.37		0.39		1.00		1.02
Diluted net income per share		0.37		0.39		0.99		1.02

Unaudited pro forma net income reflects additional intangible asset amortization expense of $0.1 million and $0.9 million for the three and nine months ended September 30, 2017 and $4.2 million and $13.1 million for the three and nine months ended September 30, 2016, respectively, as well as additional income tax (benefit) expense of ($0.1) million and $0.6 million for the three and nine months ended September 30, 2017, and $0.5 million and $2.6 million for the three and nine months ended September 30, 2016, respectively, and additional interest expense of $0.5 million and $1.4 million for the three and nine months ended September 30, 2016, respectively, that would have been recorded had the 2017 acquisitions taken place on January 1, 2016 and the 2016 acquisitions taken place on January 1, 2015. There was no additional interest expense for the three or nine months ended September 30, 2017. In addition, we included 282,577 shares of our common stock issued upon acquisition of Alpha in the weighted average shares used to calculate unaudited basic and diluted net income per share for the three and nine months ended September 30, 2016 that would have been recorded had the acquisition taken place on January 1, 2016.

Income Per Common Share

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Income Per Common Share

NOTE 14 – INCOME PER COMMON SHARE

Basic net income per share is calculated by dividing net income by the weighted average shares outstanding during the period, without consideration for common stock equivalents.

Diluted net income per share is calculated by adjusting weighted average shares outstanding for the dilutive effect of common stock equivalents outstanding for the period, determined using the treasury stock method. Potential common stock is included in the diluted income per share calculation when dilutive. Diluted net income per share was as follows (in thousands, except share and per share data):


	For the three months ended September 30,				For the nine months ended September 30,
	2017		2016		2017		2016
Net income - basic and diluted	$	12,010	$	11,549	$	30,347	$	27,355

Weighted average number of common shares outstanding		31,659,503		31,323,600		31,632,400		31,294,596
Dilutive effect of outstanding common stock awards after application of the Treasury Stock Method		107,378		54,190		80,115		57,395

Diluted shares outstanding		31,766,881		31,377,790		31,712,515		31,351,991
Basic and diluted net income per share	$	0.38	$	0.37	$	0.96	$	0.87

None of the non-vested common stock awards had an antidilutive effect on diluted net income per share for either of the three or nine months ended September 30, 2017 and 2016.

Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2017
Subsequent Events [Abstract]
Subsequent Events	NOTE 15 – SUBSEQUENT EVENTS On October 30, 2017, we acquired substantially all of the assets of A+ Insulation, LLC for total consideration of approximately $2.4 million, subject to a working capital adjustment. The initial accounting for the business combination was not complete at the time the financial statements were issued due to the timing of the acquisition and the filing of this Quarterly Report on Form 10-Q. As a result, disclosures required under ASC 805-10-50, Business Combinations, cannot be made at this time.

Significant Accounting Policies (Policies)	9 Months Ended
Significant Accounting Policies (Policies)	Sep. 30, 2017
Accounting Policies [Abstract]
Basis of Presentation and Principles of Consolidation	Basis of Presentation and Principles of Consolidation The accompanying condensed consolidated financial statements include all of our wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated. The information furnished in the condensed consolidated financial statements includes normal recurring adjustments and reflects all adjustments which are, in the opinion of management, necessary for a fair presentation of the results of operations and statements of financial position for the interim periods presented. Certain information and footnote disclosures normally included in the consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and the rules and regulations of the Securities and Exchange Commission (the “SEC”) have been condensed or omitted pursuant to such rules and regulations. We believe that the disclosures are adequate to prevent the information presented from being misleading when read in conjunction with our consolidated financial statements and the notes thereto included in Part II, Item 8, Financial Statements and Supplementary Data, of our Annual Report on Form 10-K for the fiscal year ended December 31, 2016 (the “2016 Form 10-K”), as filed with the SEC on February 28, 2017. The December 31, 2016 condensed consolidated balance sheet data herein was derived from the audited financial statements but does not include all disclosures required by U.S. GAAP. Our interim operating results for the three and nine months ended September 30, 2017 are not necessarily indicative of the results to be expected in future operating quarters. See Item 1A, Risk Factors, in our 2016 Form 10-K for additional information regarding risk factors that may impact our results. Note 2 to the consolidated financial statements in our 2016 Form 10-K describes the significant accounting policies and estimates used in preparation of the consolidated financial statements. There have been no changes to our significant accounting policies during the three or nine months ended September 30, 2017 except in the areas of derivative and hedging activities, revenue and cost recognition, investments, accounts receivable, share-based compensation and use of estimates as described below.
Accounting Policy for Derivative Instruments and Hedging Activities	Accounting Policy for Derivative Instruments and Hedging Activities We record all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether we have elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the earnings effect of the hedged forecasted transactions in a cash flow hedge. We may enter into derivative contracts that are intended to economically hedge certain of our risk, even though hedge accounting does not apply or we elect not to apply hedge accounting.
Revenue and Cost Recognition	Revenue and Cost Recognition Revenue from the sale and installation of products is recognized when all of the following have occurred: (i) persuasive evidence of an arrangement exists; (ii) delivery has occurred or services have been rendered; (iii) the price is fixed or determinable; and (iv) the ability to collect is reasonably assured. We recognize revenue using either the completed contract method or the percentage-of-completion method of accounting, depending primarily on length of time required to complete the contract. The completed contract method is used for short-term contracts for which financial position and results of operations reported on the completed-contract basis would not vary materially from those resulting from use of the percentage-of-completion method. Revenue from the sale and installation of products is recognized net of adjustments and discounts and, for revenue using the completed contract method of accounting, at the time the installation is complete. When the percentage-of-completion method is used, we estimate the costs to complete individual contracts and record as revenue that portion of the total contract price which is considered complete based on the relationship of costs incurred to date to total anticipated costs. The costs of earned revenue include all direct material and labor costs and those indirect costs related to contract performance, such as indirect labor, supplies, tools and repairs. Provisions for estimated losses on uncompleted contracts are made in the period in which such losses are determined.
Accounts Receivable	Accounts Receivable We account for trade receivables based on amounts billed to customers. Past due receivables are determined based on contractual terms. We do not accrue interest on any of our trade receivables. Retainage receivables represent the amount retained by our customers to ensure the quality of the installation and is received after satisfactory completion of each installation project. Management regularly reviews aging of retainage receivables and changes in payment trends and records an allowance when collection of amounts due are considered not probable. Amounts retained by project owners under construction contracts and included in accounts receivable and other non-current assets were $22.1 million and $0.6 million as of September 30, 2017, respectively. Amounts retained by project owners under construction contracts and included in accounts receivable as of December 31, 2016 were $10.3 million.
Share-Based Compensation	Share-Based Compensation Our share-based compensation program is designed to attract and retain employees while also aligning employees’ interests with the interests of our stockholders. Restricted stock awards are periodically granted to certain employees, officers and non-employee members of our board of directors under the stockholder-approved 2014 Omnibus Incentive Plan. Equity-based awards: Certain of our stock awards are deemed to be equity-based with a service condition and do not contain a market or performance condition with the exception of performance-based awards granted to certain officers and performance-based restricted stock units. Fair value of the non-performance-based awards to employees and officers is measured at the grant date and amortized to expense over the vesting period of the awards using the straight-line attribution method for all service-based awards with a graded vesting feature. This fair value is reduced by assumed forfeitures and adjusted for actual forfeitures until vesting. We also issue performance stock-based awards to certain officers under our 2014 Omnibus Incentive Plan. The performance-based compensation expense is recorded over the requisite service period using the graded-vesting method for the entire award. Performance-based stock awards are accounted for at fair value at date of grant. We also periodically grant restricted stock units to certain employees under the stockholder-approved 2014 Omnibus Incentive Plan. These units convert to shares upon meeting time- and performance-based requirements. Liability-based awards: Certain of our stock awards represent a predominately-fixed monetary amount that is to be settled with a variable number of shares. These awards contain both time and performance requirements, and are deemed to be liability-based, which requires that we re-measure to reflect the fair value at the end of each reporting period. The change in fair value each reporting period is recorded as compensation cost, with a corresponding increase or decrease in the share-based liability, either immediately or over the remaining service period depending on the vested status of the award. Compensation expense for both equity and liability-based restricted stock units is recorded based on an assessment each reporting period of the probability that certain performance goals will be met during the contingent vesting period. If performance goals are not probable of occurrence, no compensation expense will be recognized. If performance goals that were previously deemed probable are not or are not expected to be met, the previously recognized compensation cost related to such performance goals will be reversed. Employees and officers are subject to tax at the vesting date based on the market price of the shares on that date, or on the grant date if an election is made.
Use of Estimates	Use of Estimates Preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates include the revenue, costs and reserves established under the percentage-of-completion method, allowance for doubtful accounts, valuation allowance on deferred tax assets, valuation of the reporting unit, intangible assets and other long-lived assets, share-based compensation, fair value of derivative instruments and reserves for general liability, workers’ compensation and medical insurance. Management believes the accounting estimates are appropriate and reasonably determined; however, due to the inherent uncertainties in making these estimates, actual amounts could differ from such estimates.
Advertising Costs	Advertising Costs Advertising costs are generally expensed as incurred. Advertising expense was approximately $0.8 million and $2.4 million for the three and nine months ended September 30, 2017, respectively, and $0.8 million and $2.2 million for the three and nine months ended September 30, 2016, respectively, and is included in selling expense on the Condensed Consolidated Statements of Operations and Comprehensive Income.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements In July 2015, the Federal Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2015-11, “Inventory (Topic 330).” This update requires an entity to measure inventory within the scope of the update at the lower of cost and net realizable value. For public business entities, this update is effective for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. This ASU did not have a material impact on our consolidated financial statements. In March 2016, the FASB issued ASU 2016-06, “Derivatives and Hedging (Topic 815): Contingent Put and Call Options in Debt Instruments.” This ASU clarifies the requirement for assessing whether contingent call/put options that can accelerate the payment of principal on debt instruments are clearly and closely related to their debt hosts. An entity performing the assessment under this amendment is required to assess the embedded call/put options solely in accordance with the four-step decision sequence. Consequently, when a call/put option is contingently exercisable, an entity does not have to assess whether the event that triggers the ability to exercise a call/put option is related to interest rates or credit risks. For public business entities, this update is effective for financial statements issued for fiscal years beginning after December 15, 2016 and interim periods within those fiscal years. This ASU did not have a material impact on our consolidated financial statements. In January 2017, the FASB issued ASU 2017-03, “Accounting Changes and Error Corrections (Topic 250) and Investments-Equity Method and Joint Ventures (Topic 323).” The portion of this ASU related to Topic 250 states that when a registrant does not know or cannot reasonably estimate the impact that future adoption of certain ASUs (ASU 2014-09, 2016-02 and 2016-13) are expected to have on the financial statements, then in addition to making a statement to that effect, that registrant should consider additional qualitative financial statement disclosures to assist the reader in assessing the significance of the impact that the standard will have on the financial statements of the registrant when adopted. We have included such disclosures for ASU 2014-09 but not for ASU 2016-02 or ASU 2016-13 since we have not yet performed sufficient analysis on future effects upon implementation of the new standards. We have concluded that the portion of this ASU related to Topic 323 is not applicable and, therefore, did not have a material impact on our consolidated financial statements. This ASU is effective upon issuance. Recently Issued Accounting Pronouncements Not Yet Adopted In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” ASU 2014-09 and related subsequently issued amendments set forth a new revenue recognition model that requires identifying the contract(s) with a customer, identifying the performance obligations in the contract, determining the transaction price, allocating the transaction price to the performance obligations and recognizing the revenue upon satisfaction of performance obligations. In July 2015, the FASB voted to defer the application of the provisions of this standard for public companies until annual reporting periods beginning after December 15, 2017, including interim periods within those reporting periods. We have substantially completed our assessment on the applicability of the standard on accounting for contracts with customers with the exception of certain 2017 business combinations which we are currently assessing. The standard is expected to result in the disaggregation of certain of our insulation contracts into multiple separately identifiable performance obligations as well as additional revenue recognition disclosures. Under current accounting standards, we consider the installation service to represent one performance obligation, whereas in accordance with this ASU, we have identified multiple phases to certain of our insulation projects that should be considered separate performance obligations. Currently, we intend to adopt the new standard using the modified retrospective approach, which would allow us to recognize the cumulative effect of initially applying the standard as an adjustment to the opening balance of retained earnings. In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842).” This update amends the existing accounting standards for lease accounting, including requiring lessees to recognize most leases on their balance sheets and making targeted changes to lessor accounting. ASU 2016-02 requires a modified retrospective transition approach for all leases existing at, or entered into after, the date of initial application, with an option to use certain transition relief. For public business entities, this update is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those fiscal years, and early adoption is permitted as of the standard’s issuance date. We are evaluating whether this ASU will have a material impact on our consolidated financial statements. In May 2016, the FASB issued ASU No. 2016-11, “Revenue Recognition (Topic 605) and Derivatives and Hedging (Topic 815): Rescission of SEC Guidance Because of Accounting Standards Updates 2014-09 and 2014-16 pursuant to Staff announcements at the March 3, 2016 EITF Meeting.” This ASU rescinds from the FASB Accounting Standards Codification certain SEC paragraphs as a result of two SEC Staff Announcements at the March 3, 2016 meeting. For public entities, the amendments related to Topic 605 are effective for interim and annual reporting periods beginning after December 15, 2017 and amendments related to Topic 815 are effective for interim and annual reporting periods beginning after December 15, 2015. We have evaluated the applicability of this ASU and have determined it will not have a material impact on our consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” This ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. In addition, these amendments require the measurement of all expected credit losses for financial assets, including trade accounts receivable, held at the reporting date based on historical experience, current conditions and reasonable and supportable forecasts. For public business entities, this update is effective for financial statements issued for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. We are evaluating whether this ASU will have a material impact on our consolidated financial statements. In August 2016, the FASB issued ASU 2016-15, “Statement of Cash Flows: Clarification of Certain Cash Receipts and Cash Payments (Topic 230).” This ASU addresses the diversity in practice related to the classification of certain cash receipts and payments in the statement of cash flows by adding or clarifying guidance on eight specific cash flow issues. We have determined that this update addresses one issue that specifically impacts us, which is the classification of contingent consideration payments made after a business combination, and we are evaluating whether it will have a material impact on our consolidated financial statements. For public business entities, this update is effective for financial statements issued for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. In October 2016, the FASB issued ASU 2016-16, “Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other than Inventory.” This ASU aligns the recognition of income tax consequences for intra-entity transfers of assets other than inventory with International Financial Reporting Standards (“IFRS”). For public business entities, this update is effective for financial statements issued for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. We have evaluated the applicability of this ASU and have determined it will not have a material impact on our consolidated financial statements. In November 2016, the FASB issued ASU No. 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash.” This ASU provides guidance on the presentation of restricted cash or restricted cash equivalents in the statement of cash flows. This standard is effective for interim and annual reporting periods beginning after December 15, 2017. We will adopt this standard effective January 1, 2018 as we expect it to be applicable to us at that time. In January 2017, the FASB issued ASU 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business.” This ASU clarifies the definition of a business to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. For public business entities, this update is effective for financial statements issued for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. We have evaluated the applicability of this ASU and have determined it will not have a material impact on our consolidated financial statements. In May 2017, the FASB issued ASU 2017-09, “Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting.” This ASU provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. The amendments should be applied prospectively to an award modified on or after the adoption date. For public business entities, this update is effective for financial statements issued for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted. We have evaluated the applicability of this ASU and have determined it will not have a material impact on our consolidated financial statements. In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.” This ASU better aligns a company’s risk management activities and financial reporting for hedging relationships and makes certain improvements to simplify the application of hedge accounting guidance. For public business entities, this update is effective for financial statements issued for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years. We are evaluating whether this ASU will have a material impact on our consolidated financial statements.
Estimated Fair Value of Financial Instruments	Estimated Fair Value of Financial Instruments Accounts receivable, accounts payable and accrued liabilities as of September 30, 2017 and December 31, 2016 approximate fair value due to the short-term maturities of these financial instruments. The carrying amounts of our long-term debt, including the Term Loan and ABL Revolver as of September 30, 2017 and the term loan, delayed draw term loan and revolving line of credit as of December 31, 2016, approximate fair value due to the variable rate nature of the agreements. The carrying amounts of the obligations associated with our capital leases and vehicle and equipment notes approximate fair value as of September 30, 2017 and December 31, 2016 because we have incurred the obligations within recent fiscal years when the interest rate markets have been low and stable. All debt classifications represent Level 2 fair value measurements.

Organization (Tables)

9 Months Ended

Sep. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Percentage of Net Revenue by End Market

The following table sets forth the percentage of our net revenue by end market:


	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Residential		84	%		89	%		83	%		88	%
Commercial		16			11			17			12

		100	%		100	%		100	%		100	%

Goodwill and Intangibles (Tables)

9 Months Ended

Sep. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Change in Carrying Amount of Goodwill

The change in carrying amount of goodwill was as follows (in thousands):


	Goodwill (Gross)		Accumulated Impairment Losses			Goodwill (Net)
January 1, 2017	$	177,090	$	(70,004	)	$	107,086
Business Combinations		46,059		—			46,059
Other		515		—			515

September 30, 2017	$	223,664	$	(70,004	)	$	153,660

Schedule of Gross Carrying Amount and Accumulated Amortization

The following table provides the gross carrying amount and accumulated amortization for each major class of intangibles (in thousands):


	As of September 30, 2017						As of December 31, 2016
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Amortized intangibles:
Customer relationships	$	118,448	$	35,560	$	82,888	$	80,909	$	27,533	$	53,376
Covenants not-to-compete		11,581		4,139		7,442		8,602		2,466		6,136
Trademarks and trade names		56,781		13,097		43,684		37,303		10,498		26,805
Backlog		13,400		6,700		6,700		—		—		—

	$	200,210	$	59,496	$	140,714	$	126,814	$	40,497	$	86,317

Schedule of Estimated Aggregate Annual Amortization

Remaining estimated aggregate annual amortization expense is as follows (amounts, in thousands, are for the fiscal year ended):


Remainder of 2017	$	6,916
2018		22,983
2019		17,928
2020		17,212
2021		16,194
Thereafter		59,481

Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2017

Debt Disclosure [Abstract]

Schedule of Maturities of Debt

Debt consisted of the following (in thousands):


	As of September 30,			As of December 31,
	2017			2016
Term loans under agreements applicable to respective period, in effect, net of unamortized original issue discount and debt issuance costs of $6,184 and $447, respectively	$	293,066		$	95,803
Delayed draw term loans, in effect, net of unamortized debt issuance costs of $0 and $50, respectively		—			12,450
Vehicle and equipment notes, maturing June 2022 to September 2022; payable in various monthly installments, including interest rates ranging from 2% to 4%		46,713			38,186
Various notes payable, maturing through March 2025; payable in various installments, including interest rates ranging from 4% to 6%		4,066			4,988

		343,845			151,427
Less: current maturities		(15,550	)		(17,192	)

Long-term debt, less current maturities	$	328,295		$	134,235

Costs and Estimated Earnings on Uncompleted Contracts (Tables)

9 Months Ended

Sep. 30, 2017

Contractors [Abstract]

Schedule of Cost and Estimated Earnings on Uncompleted Contracts

Uncompleted contracts were as follows for the nine months ended September 30 (in thousands):


	2017
Costs incurred on uncompleted contracts	$	70,403
Estimated earnings		38,691

Total		109,094
Less: Billings to date		108,798

Net under (over) billings	$	296

Schedule of Net Under (Over) Billings

Net under (over) billings were as follows as of September 30 (in thousands):


	2017
Costs and estimated earnings in excess of billings on uncompleted contracts	$	5,323
Billings in excess of costs and estimated earnings on uncompleted contracts		(5,027	)

Net under (over) billings	$	296

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2017

Fair Value Disclosures [Abstract]

Schedule of Fair Values of Financial Assets and Liabilities

The fair values of financial assets and liabilities were as follows as of September 30 (in thousands):


	Fair value as of September 30, 2017
	Total		Level 1		Level 2		Level 3
Financial assets:
Cash equivalents	$	58,825	$	58,825	$	—	$	—
Investments		25,106		—		25,106		—

Total financial assets	$	83,931	$	58,825	$	25,106	$	—

Financial liabilities:
Derivative financial instruments, net of tax	$	45	$	—	$	45	$	—

Employee Benefits (Tables)

9 Months Ended

Sep. 30, 2017

Postemployment Benefits [Abstract]

Summary of Workers' Compensation Known Claims and IBNR Reserves

Workers’ compensation known claims and IBNR reserves included on the Condensed Consolidated Balance Sheets were as follows (in thousands):


	September 30, 2017		December 31, 2016
Included in other current liabilities	$	4,913	$	4,595
Included in other long-term liabilities		8,837		7,052

	$	13,750	$	11,647

Schedule of Insurance Receivable for Claims

That receivable offsets an equal liability included within other long-term liabilities noted above and was as follows (in thousands):


	September 30, 2017		December 31, 2016
Included in other non-current assets	$	1,828	$	1,249

Summary of Equity-based Awards for Employees

Amounts for each category of equity-based award for employees as of December 31, 2016 and changes during the nine months ended September 30, 2017 were as follows:


	Common Stock Awards					Performance-Based Stock Awards				Performance-Based Restricted Stock Units
	Awards			Weighted Average Fair Market Value Per Share		Awards		Weighted Average Fair Market Value Per Share		Units			Weighted Average Fair Market Value Per Share
Nonvested awards/units at December 31, 2016		161,174		$	26.36		—	$	—		—		$	—
Granted		101,241			52.00		77,254		41.00		73,880			52.00
Vested		(57,816	)		26.30		—		—		—			—
Forfeited/Cancelled		(1,541	)		36.33		—		—		(475	)		52.00

Nonvested awards/units at September 30, 2017		203,058		$	39.09		77,254	$	41.00		73,405		$	52.00

Related Party Transactions (Tables)

9 Months Ended

Sep. 30, 2017

Schedule of Common or Related Party Transactions


	Three months ended September 30,				Nine months ended September 30,
	2017		2016		2017		2016
Sales	$	2,641	$	2,182	$	7,363	$	5,282
Purchases		302		114		901		370
Rent		290		163		875		472

Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of Accrued General Insurance Reserves

Accrued general insurance reserves included on the Condensed Consolidated Balance Sheets were as follows (in thousands):


	September 30, 2017		December 31, 2016
Included in other current liabilities	$	2,069	$	1,949
Included in other long-term liabilities		7,627		7,104

	$	9,696	$	9,053

Schedule of Insurance Receivable for Claims


	September 30, 2017		December 31, 2016
Insurance receivable and indemnification asset for claims under a fully insured policy	$	2,773	$	2,773
Insurance receivable for claims that exceeded the stop loss limit		2		26

Total insurance receivables included in other non-current assets	$	2,775	$	2,799

Future Minimum Lease Payments Under Noncancellable Operating Leases


Remainder of 2017	$	295
2018		988
2019		829
2020		566
2021		583
Thereafter		600

Business Combinations (Tables)

9 Months Ended

Sep. 30, 2017

Business Combinations [Abstract]

Schedule of Business Combinations


									Fair Value		Total		Three months ended September 30, 2017					Nine months ended September 30, 2017
2017 Acquisitions	Date		Acquisition Type		Cash Paid		Seller Obligations		of Common Stock Issued		Purchase Price		Revenue		Net (Loss) Income			Revenue		Net Income (Loss)
Alpha(1)		1/5/2017		Share	$	103,810	$	2,002	$	10,859	$	116,671	$	29,334	$	(271	)	$	87,830	$	190
Columbia		6/26/2017		Asset		8,768		225		—		8,993		3,026		73			3,241		80
Astro		9/18/2017		Asset		8,851		490		—		9,341		264		46			264		46
Other		Various		Asset		9,812		1,042		—		10,854		6,499		84			11,671		366

Total					$	131,241	$	3,759	$	10,859	$	145,859	$	39,123	$	(68	)	$	103,006	$	682

(1)


											Three months ended September 30, 2016					Nine months ended September 30, 2016
2016 Acquisitions	Date		Acquisition Type		Cash Paid		Seller Obligations		Total Purchase Price		Revenue		Net Income (Loss)			Revenue		Net Income (Loss)
Alpine Insulation Co., Inc.		4/12/2016		Asset	$	21,151	$	1,560	$	22,711	$	7,957	$	806		$	14,734	$	1,238
Other		Various		Asset		15,276		1,289		16,565		5,519		(200	)		12,283		(664	)

Total					$	36,427	$	2,849	$	39,276	$	13,476	$	606		$	27,017	$	574

Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed


	2017															2016
	Alpha			Columbia			Astro			Other			Total			Alpine			Other			Total
Estimated fair values:
Cash	$	247		$	—		$	—		$	—		$	247		$	—		$	—		$	—
Accounts receivable		30,361			990			924			2,137			34,412			3,959			2,080			6,039
Inventories		1,851			704			296			1,014			3,865			700			888			1,588
Other current assets		4,827			8			36			8			4,879			—			12			12
Property and equipment		1,528			659			640			1,144			3,971			656			1,188			1,844
Intangibles		57,100			4,760			4,966			5,939			72,765			12,800			8,492			21,292
Goodwill		38,679			2,211			2,808			2,361			46,059			6,642			5,270			11,912
Other non-current assets		150			31			—			191			372			—			94			94
Accounts payable and other current liabilities		(18,072	)		(370	)		(329	)		(1,940	)		(20,711	)		(2,046	)		(1,459	)		(3,505	)

Fair value of assets acquired and purchase price		116,671			8,993			9,341			10,854			145,859			22,711			16,565			39,276
Less fair value of common stock issued		10,859			—			—			—			10,859			—			—			—
Less seller obligations		2,002			225			490			1,042			3,759			1,560			1,289			2,849

Cash paid	$	103,810		$	8,768		$	8,851		$	9,812		$	131,241		$	21,151		$	15,276		$	36,427

Estimates of Acquired Intangible Assets

Estimates of acquired intangible assets related to the acquisitions are as follows for the nine months ended September 30 (dollars in thousands):


	2017				2016
Acquired intangibles assets	Estimated Fair Value		Weighted Average Estimated Useful Life (yrs.)		Estimated Fair Value		Weighted Average Estimated Useful Life (yrs.)
Customer relationships	$	37,533		8	$	12,862		9
Trademarks and trade names		19,403		15		6,116		15
Non-competition agreements		2,429		5		2,315		5
Backlog		13,400		1.5		—		—

Pro Forma Results of Operations


	Pro forma for the three months ended September 30,				Pro forma for the nine months ended September 30,
	2017		2016		2017		2016
Net revenue	$	297,820	$	272,010	$	853,897	$	771,313
Net income		11,836		12,328		31,544		32,117
Basic net income per share		0.37		0.39		1.00		1.02
Diluted net income per share		0.37		0.39		0.99		1.02

Income Per Common Share (Tables)

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Summary of Diluted Net Income Per Share

Diluted net income per share was as follows (in thousands, except share and per share data):


	For the three months ended September 30,				For the nine months ended September 30,
	2017		2016		2017		2016
Net income - basic and diluted	$	12,010	$	11,549	$	30,347	$	27,355

Weighted average number of common shares outstanding		31,659,503		31,323,600		31,632,400		31,294,596
Dilutive effect of outstanding common stock awards after application of the Treasury Stock Method		107,378		54,190		80,115		57,395

Diluted shares outstanding		31,766,881		31,377,790		31,712,515		31,351,991
Basic and diluted net income per share	$	0.38	$	0.37	$	0.96	$	0.87

Organization - Additional Information (Detail)	9 Months Ended
Organization - Additional Information (Detail)	Sep. 30, 2017 Location Segment
Basis Of Presentation And Organization [Line Items]
Number of operating segment \| Segment	1
United States [Member]
Basis Of Presentation And Organization [Line Items]
Number of locations the company operates \| Location	100

Organization - Summary of Percentage of Net Revenue by End Market (Detail) - Customer Concentration Risk [Member] - Revenue [Member]	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Product Information [Line Items]
Net revenues percentage	100.00%	100.00%	100.00%	100.00%
Residential [Member]
Product Information [Line Items]
Net revenues percentage	84.00%	89.00%	83.00%	88.00%
Commercial [Member]
Product Information [Line Items]
Net revenues percentage	16.00%	11.00%	17.00%	12.00%

Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Accounting Policies and General Information [Line Items]
Advertising expenses	$ 0.8	$ 0.8	$ 2.4	$ 2.2
Other Non-Current Assets [Member]
Accounting Policies and General Information [Line Items]
Retainage receivables	0.6		0.6
Accounts Receivable [Member]
Accounting Policies and General Information [Line Items]
Retainage receivables	$ 22.1		$ 22.1		$ 10.3

Investments - Additional Information (Detail) - USD ($)	9 Months Ended
Investments - Additional Information (Detail) - USD ($)	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Schedule of Held-to-maturity Securities [Line Items]
Cash and cash equivalents	$ 67,008,000	$ 14,482,000	$ 19,050,000	$ 6,818,000
Investments	25,114,000
Held-to-Maturity Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Investments	$ 25,100,000	0
Investment maturity	One year or less
Money Market Funds [Member] \| Level 1 [Member]
Schedule of Held-to-maturity Securities [Line Items]
Cash and cash equivalents	$ 58,800,000	$ 0.0

Goodwill and Intangibles - Summary of Change in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Jan. 01, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill (Gross), beginning balance	$ 177,090
Business Combinations	46,059
Other	515
Goodwill (Gross), ending balance	223,664
Accumulated Impairment Losses	(70,004)	$ (70,004)
Goodwill (Net), beginning balance	107,086
Business Combinations	46,059
Other	515
Goodwill (Net), ending balance	$ 153,660

Goodwill and Intangibles - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2017 USD ($) Acquisition	Sep. 30, 2016 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Number of immaterial acquisitions \| Acquisition	3
Goodwill impairment	$ 0	$ 0
Increase in gross carrying amount of intangibles	$ 73,400,000

Goodwill and Intangibles - Schedule of Gross Carrying Amount and Accumulated Amortization (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 200,210	$ 126,814
Accumulated Amortization	59,496	40,497
Net Book Value	140,714	86,317
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	118,448	80,909
Accumulated Amortization	35,560	27,533
Net Book Value	82,888	53,376
Covenants Not-to-Compete [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,581	8,602
Accumulated Amortization	4,139	2,466
Net Book Value	7,442	6,136
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	56,781	37,303
Accumulated Amortization	13,097	10,498
Net Book Value	43,684	$ 26,805
Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	13,400
Accumulated Amortization	6,700
Net Book Value	$ 6,700

Goodwill and Intangibles - Schedule of Estimated Aggregate Annual Amortization (Detail) $ in Thousands	Sep. 30, 2017 USD ($)
Finite Lived Intangible Assets Net Amortization Expense Rolling Maturity [Abstract]
Remainder of 2017	$ 6,916
2018	22,983
2019	17,928
2020	17,212
2021	16,194
Thereafter	$ 59,481

Long-term Debt - Schedule of Maturities of Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
Term loans under agreements applicable to respective period, in effect, net of unamortized original issue discount and debt issuance costs of $6,184 and $447, respectively	$ 293,066	$ 95,803
Delayed draw term loans, in effect, net of unamortized debt issuance costs of $0 and $50, respectively		12,450
Vehicle and equipment notes, maturing June 2022 to September 2022; payable in various monthly installments, including interest rates ranging from 2% to 4%	46,713	38,186
Various notes payable, maturing through March 2025; payable in various installments, including interest rates ranging from 4% to 6%	4,066	4,988
Total long term debt	343,845	151,427
Total long term debt	343,845	151,427
Less: current maturities	(15,550)	(17,192)
Long-term debt, less current maturities	$ 328,295	$ 134,235

Long-term Debt - Schedule of Maturities of Debt (Parenthetical) (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Notes payable maturity date	2025-03
Minimum [Member]
Debt Instrument [Line Items]
Notes payable Interest rate	4.00%
Maximum [Member]
Debt Instrument [Line Items]
Notes payable Interest rate	6.00%
Term Loan Agreement [Member]
Debt Instrument [Line Items]
Unamortized issue discount and debt issuance costs	$ 6,184	$ 447
Delayed Draw [Member]
Debt Instrument [Line Items]
Unamortized issue discount and debt issuance costs	$ 0	$ 50
Vehicle and Equipment [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Notes payable Interest rate	2.00%
Notes payable maturity date	2022-06
Vehicle and Equipment [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Notes payable Interest rate	4.00%
Notes payable maturity date	2022-09

Long-term Debt - Additional Information (Detail) - USD ($)		9 Months Ended
	Apr. 13, 2017	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Assets relating to master loan agreements, Gross		$ 64,200,000	$ 64,200,000
Capital leased assets, net book value		$ 14,400,000	16,400,000
Master Loan Agreements [Member]
Debt Instrument [Line Items]
Payment Period, typical		60 months
Assets relating to master loan agreements, Gross		$ 66,800,000	48,700,000
Capital leased assets, net book value		47,300,000	$ 38,000,000
Term Loan Agreement [Member] \| Eurodollar [Member]
Debt Instrument [Line Items]
Margin interest rate percentage	3.00%
Term Loan Agreement [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Margin interest rate percentage	2.00%
Term Loan Agreement [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 300,000,000
Term loan facility maturity period	7 years
Quarterly principal payment of term loan		$ 800,000
Credit facility, amortization description		The Term Loan amortizes in quarterly principal payments of approximately $0.8 million starting on September 30, 2017, with any remaining unpaid balances due on April 15, 2024, which is the maturity date. Loans incurred under the ABL Revolver will have a final maturity of April 13, 2022.
Percentage of mandatory pre-payments on debt issuance		100.00%
Percentage of mandatory pre-payments on sale or disposition of assets		100.00%
Percentage of mandatory pre-payments on excess cash flow		50.00%
Excess cash flow limit for mandatory pre-payments of debt		$ 5,000,000
Term Loan Agreement [Member] \| Term Loan [Member] \| Leverage Ratio Range One [Member]
Debt Instrument [Line Items]
Percentage of mandatory pre-payments on excess cash flow		25.00%
Term Loan Agreement [Member] \| Term Loan [Member] \| Leverage Ratio Range Two [Member]
Debt Instrument [Line Items]
Percentage of mandatory pre-payments on excess cash flow		0.00%
ABL Credit Agreement [Member]
Debt Instrument [Line Items]
Fixed coverage ratio, covenants requirements	1.00%
ABL Credit Agreement [Member] \| Eurodollar Rate Loan One [Member]
Debt Instrument [Line Items]
Margin interest rate percentage	1.25%
ABL Credit Agreement [Member] \| Eurodollar Rate Loan Two [Member]
Debt Instrument [Line Items]
Margin interest rate percentage	1.50%
ABL Credit Agreement [Member] \| Eurodollar Rate Loan Three [Member]
Debt Instrument [Line Items]
Margin interest rate percentage	1.75%
ABL Credit Agreement [Member] \| Base Rate Loan One [Member]
Debt Instrument [Line Items]
Margin interest rate percentage	0.25%
ABL Credit Agreement [Member] \| Base Rate Loan Two [Member]
Debt Instrument [Line Items]
Margin interest rate percentage	0.50%
ABL Credit Agreement [Member] \| Base Rate Loan Three [Member]
Debt Instrument [Line Items]
Margin interest rate percentage	0.75%
ABL Credit Agreement [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit maximum borrowing capacity	$ 100,000,000
Maturity date		Apr. 13, 2022
ABL Credit Agreement [Member] \| Letter of Credit [Member]
Debt Instrument [Line Items]
Line of credit maximum borrowing capacity	$ 50,000,000

Costs and Estimated Earnings on Uncompleted Contracts - Schedule of Cost and Estimated Earnings on Uncompleted Contracts (Detail) $ in Thousands	Sep. 30, 2017 USD ($)
Contractors [Abstract]
Costs incurred on uncompleted contracts	$ 70,403
Estimated earnings	38,691
Total	109,094
Less: Billings to date	108,798
Net under (over) billings	$ 296

Costs and Estimated Earnings on Uncompleted Contracts - Schedule of Net Under (Over) Billings (Detail) $ in Thousands	Sep. 30, 2017 USD ($)
Contractors [Abstract]
Costs and estimated earnings in excess of billings on uncompleted contracts	$ 5,323
Billings in excess of costs and estimated earnings on uncompleted contracts	(5,027)
Net under (over) billings	$ 296

Fair Value Measurements - Schedule of Fair Values of Financial Assets and Liabilities (Detail) $ in Thousands	Sep. 30, 2017 USD ($)
Financial assets:
Cash equivalents	$ 58,825
Investments	25,106
Total financial assets	83,931
Financial liabilities:
Derivative financial instruments, net of tax	45
Level 1 [Member]
Financial assets:
Cash equivalents	58,825
Total financial assets	58,825
Level 2 [Member]
Financial assets:
Investments	25,106
Total financial assets	25,106
Financial liabilities:
Derivative financial instruments, net of tax	$ 45

- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References + Details

Fair Value Measurements - Additional Information (Detail)	Dec. 31, 2016 USD ($)
Fair Value Disclosures [Abstract]
Fair value of asset (liability)	$ 0

Derivative and Hedging Activities - Additional Information (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2017 USD ($) Instruments	Sep. 30, 2018 USD ($)
Scenario, Forecast [Member] \| Interest Expense [Member] \| Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Reclassification from accumulated other comprehensive income to interest expense		$ 500,000
Interest Rate Swap [Member] \| Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative instruments	$ 100,000,000
Derivatives, number of instruments held \| Instruments	2
Notional amount amortized	$ 95,300,000
Notional amount maturity date	May 31, 2022

Employee Benefits - Additional Information (Detail)	3 Months Ended		9 Months Ended
Employee Benefits - Additional Information (Detail)	Sep. 30, 2017 USD ($) shares	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) Installment shares	Sep. 30, 2016 USD ($) shares	Dec. 31, 2016 USD ($)
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Healthcare benefit expense, net of employee contributions	$ 4,100,000	$ 3,700,000	$ 12,400,000	$ 11,400,000
Accrued compensation	25,975,000		25,975,000		$ 18,212,000
Workers' compensation expense	3,100,000	3,400,000	9,800,000	9,200,000
Unrecognized compensation expense	6,200,000		$ 6,200,000
Compensation cost not yet recognized, period for recognition			2 years 2 months 12 days
Performance Based Awards [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Common stock granted, shares \| shares			77,254
Share-based compensation expense	300,000		$ 700,000
Unrecognized compensation expense	2,400,000		$ 2,400,000
Compensation cost not yet recognized, period for recognition			2 years 1 month 6 days
Performance Based Restricted Stock Units [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Common stock granted, shares \| shares			73,880
Share-based compensation expense	1,000,000		$ 1,700,000
Unrecognized compensation expense	2,100,000		$ 2,100,000
Compensation cost not yet recognized, period for recognition			7 months 6 days
Performance Based Restricted Stock Units [Member] \| Common Stock [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Share-based compensation expense	100,000		$ 100,000
Compensation cost not yet recognized, period for recognition			4 years 2 months 30 days
2014 Omnibus Incentive Plan [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Common stock granted, shares \| shares			100,000
Number of equal installments for vesting common stock \| Installment			3
Number of shares surrendered to satisfy tax withholding obligations \| shares			10,000
Share based compensation, recognized tax benefits	$ 0	0	$ 600,000	300,000
Common stock shares available for issuance \| shares	2,600,000		2,600,000
2014 Omnibus Incentive Plan [Member] \| Common Stock Awards [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Share-based compensation expense	$ 800,000	$ 400,000	$ 1,900,000	$ 1,200,000
2014 Omnibus Incentive Plan [Member] \| Directors [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Common stock granted, shares \| shares			6,000	9,000
Share-based compensation expense			$ 300,000	$ 300,000
Medical IBNR Included in Accrued Compensation [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Accrued compensation	$ 1,900,000		$ 1,900,000		$ 1,700,000

Employee Benefits - Summary of Workers' Compensation Known Claims and IBNR Reserves (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Employee-related Liabilities [Abstract]
Included in other current liabilities	$ 4,913	$ 4,595
Included in other long-term liabilities	8,837	7,052
Workers' Compensation Liability	$ 13,750	$ 11,647

Employee Benefits - Schedule of Insurance Receivable for Claims (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Workers' Compensation [Member]
Malpractice Insurance [Line Items]
Included in other non-current assets	$ 1,828	$ 1,249

Employee Benefits - Summary of Equity-Based Awards for Employees (Detail)	9 Months Ended
	Sep. 30, 2017 $ / shares shares
Common Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested common stock awards, Beginning balance \| shares	161,174
Granted \| shares	101,241
Vested \| shares	(57,816)
Forfeited/Cancelled \| shares	(1,541)
Nonvested common stock awards, Ending balance \| shares	203,058
Nonvested performance-based stock awards, Beginning balance \| $ / shares	$ 26.36
Granted \| $ / shares	52.00
Vested \| $ / shares	26.30
Forfeited/Cancelled \| $ / shares	36.33
Nonvested performance-based stock awards, Ending balance \| $ / shares	$ 39.09
Performance Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested performance-based stock awards/units, Beginning balance \| shares	0
Granted \| shares	77,254
Vested \| shares	0
Nonvested performance-based stock awards/units, Ending balance \| shares	77,254
Nonvested performance-based stock awards/units, Beginning balance \| $ / shares	$ 0.00
Granted \| $ / shares	41.00
Vested \| $ / shares	0
Nonvested performance-based stock awards/units, Ending balance \| $ / shares	$ 41.00
Performance Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested performance-based stock awards/units, Beginning balance \| shares	0
Granted \| shares	73,880
Vested \| shares	0
Forfeited/Cancelled \| shares	(475)
Nonvested performance-based stock awards/units, Ending balance \| shares	73,405
Nonvested performance-based stock awards/units, Beginning balance \| $ / shares	$ 0.00
Granted \| $ / shares	52.00
Vested \| $ / shares	0
Forfeited/Cancelled \| $ / shares	52.00
Nonvested performance-based stock awards/units, Ending balance \| $ / shares	$ 52.00

Income Taxes - Additional Information (Detail)	3 Months Ended	9 Months Ended
Income Taxes - Additional Information (Detail)	Sep. 30, 2017	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Effective tax rate	32.30%	33.80%

Related Party Transactions - Schedule of Related Party Transactions (Detail) - Affiliated Entity [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Related Party Transaction [Line Items]
Sales	$ 2,641	$ 2,182	$ 7,363	$ 5,282
Purchases	302	114	901	370
Rent	$ 290	$ 163	$ 875	$ 472

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Accounts receivable, related parties	$ 2.0	$ 1.5
M/I Homes Inc [Member]
Related Party Transaction [Line Items]
Accounts receivable, related parties	$ 1.0	$ 0.8

Commitments and Contingencies - Schedule of Accrued General Insurance Reserves (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Included in other current liabilities	$ 2,069	$ 1,949
Included in other long-term liabilities	7,627	7,104
Total	$ 9,696	$ 9,053

Commitments and Contingencies - Schedule of Insurance Receivable for Claims (Detail) - General Liability [Member] - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Commitments And Contingencies Disclosure [Line Items]
Insurance receivable and indemnification asset for claims under a fully insured policy	$ 2,773	$ 2,773
Insurance receivable for claims that exceeded the stop loss limit	2	26
Total insurance receivables included in other non-current assets	$ 2,775	$ 2,799

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Commitments And Contingencies Disclosure [Line Items]
Capital lease assets	$ 64.2	$ 64.2
Assets fully depreciated	23.7	22.8
Capital leased assets, net book value	$ 14.4	$ 16.4
Minimum [Member]
Commitments And Contingencies Disclosure [Line Items]
Estimated life of capital lease	4 years
Noncancellable operating leases, renewal period	1 year
Maximum [Member]
Commitments And Contingencies Disclosure [Line Items]
Estimated life of capital lease	6 years
Noncancellable operating leases, renewal period	5 years

Commitments and Contingencies - Future Minimum Lease Payments Under Noncancellable Operating Leases (Detail) $ in Thousands	Sep. 30, 2017 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remainder of 2017	$ 295
2018	988
2019	829
2020	566
2021	583
Thereafter	$ 600

Business Combinations - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) Acquisition	Sep. 30, 2016 USD ($) shares
Business Acquisition [Line Items]
Percentage of voting equity interests acquired	100.00%		100.00%
Goodwill acquired expected to be tax deductible	$ 45,600		$ 45,600
Number of immaterial acquisitions \| Acquisition			3
Amortization of intangibles	6,824	$ 2,889	$ 19,790	$ 8,178
Income tax expense (benefit)	5,721	6,723	15,502	14,792
Interest expense	4,421	1,544	11,456	4,605
Administrative [Member]
Business Acquisition [Line Items]
Acquisition-related costs	900	500	2,300	$ 1,300
Alpha [Member]
Business Acquisition [Line Items]
Increase in goodwill			2,200
Common stock issued upon acquisition \| shares				282,577
Columbia [Member]
Business Acquisition [Line Items]
Increase in goodwill			500
Increase in seller obligations			400
Increase in purchase price			600
Combined Business Acquisitions [Member]
Business Acquisition [Line Items]
Amortization of intangibles	100	4,200	900	$ 13,100
Income tax expense (benefit)	$ (100)	500	$ 600	2,600
Interest expense		$ 500		$ 1,400

Business Combinations - Summary of Business Acquisitions (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Jan. 05, 2017
Business Acquisition [Line Items]
Cash paid	$ 131,241			$ 36,427
Seller Obligations	3,759	$ 2,849	$ 3,759	2,849
Total Purchase Price	145,859			39,276
Fair Value of Common Stock Issued	10,859		10,859
Revenue	295,193	225,392	833,058	629,003
Net (Loss) Income	$ 12,010	11,549	$ 30,347	$ 27,355
Alpha [Member]
Business Acquisition [Line Items]
Date			Jan. 05, 2017
Acquisition Type	Share
Cash paid	$ 103,810		$ 103,810
Seller Obligations	2,002		2,002
Total Purchase Price	116,671
Fair Value of Common Stock Issued	10,859		10,859		$ 10,859
Revenue	29,334		87,830
Net (Loss) Income	$ (271)		$ 190
Columbia [Member]
Business Acquisition [Line Items]
Date			Jun. 26, 2017
Acquisition Type	Asset
Cash paid	$ 8,768		$ 8,768
Seller Obligations	225		225
Total Purchase Price	8,993
Revenue	3,026		3,241
Net (Loss) Income	$ 73		$ 80
Astro [Member]
Business Acquisition [Line Items]
Date			Sep. 18, 2017
Acquisition Type	Asset
Cash paid	$ 8,851		$ 8,851
Seller Obligations	490		490
Total Purchase Price	9,341
Revenue	264		264
Net (Loss) Income	$ 46		46
Other Acquisition [Member]
Business Acquisition [Line Items]
Acquisition Type	Asset			Asset
Cash paid	$ 9,812		9,812	$ 15,276
Seller Obligations	1,042	1,289	1,042	1,289
Total Purchase Price	10,854			16,565
Revenue	6,499	5,519	11,671	12,283
Net (Loss) Income	84	(200)	366	$ (664)
2017 Acquisitions [Member]
Business Acquisition [Line Items]
Revenue	39,123		103,006
Net (Loss) Income	$ (68)		$ 682
Alpine Insulation Co Inc [Member]
Business Acquisition [Line Items]
Date				Apr. 12, 2016
Acquisition Type				Asset
Cash paid				$ 21,151
Seller Obligations		1,560		1,560
Total Purchase Price				22,711
Revenue		7,957		14,734
Net (Loss) Income		806		1,238
2016 Acquisitions [Member]
Business Acquisition [Line Items]
Revenue		13,476		27,017
Net (Loss) Income		$ 606		$ 574

Business Combinations - Summary of Business Acquisitions (Parenthetical) (Detail) - USD ($) $ in Thousands	Jan. 05, 2017	Sep. 30, 2017
Business Acquisition [Line Items]
Purchase consideration, value of shares issued		$ 10,859
Alpha [Member]
Business Acquisition [Line Items]
Business combination contingencies amount recognized	$ 21,700
Purchase consideration, number of shares issued	282,577
Purchase consideration, value of shares issued	$ 10,859	$ 10,859

Business Combinations - Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill	$ 153,660	$ 153,660		$ 107,086
Less seller obligations		3,759	$ 2,849
Cash paid	131,241		36,427
Alpha [Member]
Business Acquisition [Line Items]
Cash	247	247
Accounts receivable	30,361	30,361
Inventories	1,851	1,851
Other current assets	4,827	4,827
Property and equipment	1,528	1,528
Intangibles	57,100	57,100
Goodwill	38,679	38,679
Other non-current assets	150	150
Accounts payable and other current liabilities	(18,072)	(18,072)
Fair value of assets acquired and purchase price	116,671	116,671
Less fair value of common stock issued		10,859
Less seller obligations		2,002
Cash paid	103,810	103,810
Columbia [Member]
Business Acquisition [Line Items]
Accounts receivable	990	990
Inventories	704	704
Other current assets	8	8
Property and equipment	659	659
Intangibles	4,760	4,760
Goodwill	2,211	2,211
Other non-current assets	31	31
Accounts payable and other current liabilities	(370)	(370)
Fair value of assets acquired and purchase price	8,993	8,993
Less seller obligations		225
Cash paid	8,768	8,768
Astro [Member]
Business Acquisition [Line Items]
Accounts receivable	924	924
Inventories	296	296
Other current assets	36	36
Property and equipment	640	640
Intangibles	4,966	4,966
Goodwill	2,808	2,808
Accounts payable and other current liabilities	(329)	(329)
Fair value of assets acquired and purchase price	9,341	9,341
Less seller obligations		490
Cash paid	8,851	8,851
Other Acquisition [Member]
Business Acquisition [Line Items]
Accounts receivable	2,137	2,137	2,080
Inventories	1,014	1,014	888
Other current assets	8	8	12
Property and equipment	1,144	1,144	1,188
Intangibles	5,939	5,939	8,492
Goodwill	2,361	2,361	5,270
Other non-current assets	191	191	94
Accounts payable and other current liabilities	(1,940)	(1,940)	(1,459)
Fair value of assets acquired and purchase price	10,854	10,854	16,565
Less seller obligations		1,042	1,289
Cash paid	9,812	9,812	15,276
Combined Business Acquisitions [Member]
Business Acquisition [Line Items]
Cash	247	247
Accounts receivable	34,412	34,412	6,039
Inventories	3,865	3,865	1,588
Other current assets	4,879	4,879	12
Property and equipment	3,971	3,971	1,844
Intangibles	72,765	72,765	21,292
Goodwill	46,059	46,059	11,912
Other non-current assets	372	372	94
Accounts payable and other current liabilities	(20,711)	(20,711)	(3,505)
Fair value of assets acquired and purchase price	$ 145,859	145,859	39,276
Less fair value of common stock issued		10,859
Less seller obligations		3,759	2,849
Cash paid		$ 131,241	36,427
Alpine [Member]
Business Acquisition [Line Items]
Accounts receivable			3,959
Inventories			700
Property and equipment			656
Intangibles			12,800
Goodwill			6,642
Accounts payable and other current liabilities			(2,046)
Fair value of assets acquired and purchase price			22,711
Less seller obligations			1,560
Cash paid			$ 21,151

Business Combinations - Estimates of Acquired Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$ 37,533	$ 12,862
Weighted Average Estimated Useful Life (yrs)	8 years	9 years
Trademarks and Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$ 19,403	$ 6,116
Weighted Average Estimated Useful Life (yrs)	15 years	15 years
Covenants Not-to-Compete [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$ 2,429	$ 2,315
Weighted Average Estimated Useful Life (yrs)	5 years	5 years
Backlog [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$ 13,400
Weighted Average Estimated Useful Life (yrs)	1 year 6 months

Business Combinations - Pro Forma Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Business Combination Increase Decrease To Reflect Liabilities Acquired At Fair Value [Abstract]
Net revenue	$ 297,820	$ 272,010	$ 853,897	$ 771,313
Net income	$ 11,836	$ 12,328	$ 31,544	$ 32,117
Basic net income per share	$ 0.37	$ 0.39	$ 1.00	$ 1.02
Diluted net income per share	$ 0.37	$ 0.39	$ 0.99	$ 1.02

Income Per Common Share - Summary of Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Net income - basic and diluted	$ 12,010	$ 11,549	$ 30,347	$ 27,355
Weighted average number of common shares outstanding	31,659,503	31,323,600	31,632,400	31,294,596
Dilutive effect of outstanding common stock awards after application of the Treasury Stock Method	107,378	54,190	80,115	57,395
Diluted shares outstanding	31,766,881	31,377,790	31,712,515	31,351,991
Basic and diluted net income per share	$ 0.38	$ 0.37	$ 0.96	$ 0.87

Income Per Common Share - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of income	0	0	0	0

Subsequent Events - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Oct. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
Subsequent Event [Line Items]
Cash consideration paid for acquisition		$ 131,241	$ 36,427
Subsequent Event [Member] \| A+ Insulation, LLC [Member]
Subsequent Event [Line Items]
Cash consideration paid for acquisition	$ 2,400
Business acquisition date	Oct. 30, 2017