Installed Building Products (IBP) 10-Q 4 Nov 21 2021 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2021	Oct. 27, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	001-36307
Entity Registrant Name	Installed Building Products, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	45-3707650
Entity Address, Address Line One	495 South High Street
Entity Address, Address Line Two	Suite 50
Entity Address, City or Town	Columbus
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	43215
City Area Code	614
Local Phone Number	221-3399
Title of 12(b) Security	Common Stock,
Trading Symbol	IBP
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		29,707,155
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001580905
Current Fiscal Year End Date	--12-31

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 191,435	$ 231,520
Accounts receivable (less allowance for credit losses of $8,784 and $8,789 at September 30, 2021 and December 31, 2020, respectively)	306,590	266,566
Inventories	118,093	77,179
Prepaid expenses and other current assets	56,803	48,678
Total current assets	672,921	623,943
Non-current assets
Property and equipment, net	104,977	104,022
Operating lease right-of-use assets	61,028	53,766
Goodwill	257,106	216,870
Customer relationships, net	204,100	171,393
Other non-current assets	26,996	17,682
Total assets	1,327,128	1,187,676
Current liabilities
Current maturities of long-term debt	24,557	23,355
Current maturities of operating lease obligations	21,278	18,758
Current maturities of finance lease obligations	1,780	2,073
Accounts payable	119,583	101,462
Accrued compensation	60,623	45,876
Other current liabilities	56,970	44,951
Total current liabilities	284,791	236,475
Long-term debt	542,517	541,957
Operating lease obligations	39,155	34,413
Finance lease obligations	3,038	2,430
Deferred income taxes	9,035	35
Other long-term liabilities	55,866	53,184
Total liabilities	934,402	868,494
Commitments and contingencies
Stockholders’ equity
Preferred Stock; $0.01 par value: 5,000,000 authorized and 0 shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively	0	0
Common stock; $0.01 par value: 100,000,000 authorized, 33,271,659 and 33,141,879 issued and 29,707,155 and 29,623,272 shares outstanding at September 30, 2021 and December 31, 2020, respectively	333	331
Additional paid in capital	208,535	199,847
Retained earnings	332,087	269,420
Treasury stock; at cost: 3,564,504 and 3,518,607 shares at September 30, 2021 and December 31, 2020, respectively	(147,228)	(141,653)
Accumulated other comprehensive loss	(1,001)	(8,763)
Total stockholders’ equity	392,726	319,182
Total liabilities and stockholders’ equity	1,327,128	1,187,676
Customer relationships
Non-current assets
Customer relationships, net	133,759	108,504
Intangible Assets Excluding Customer Relationships
Non-current assets
Customer relationships, net	$ 70,341	$ 62,889

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets
Allowance for credit losses	$ 8,784	$ 8,789
Stockholders’ equity
Preferred stock, par value (in USD per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	33,271,659	33,141,879
Common stock, shares outstanding (in shares)	29,707,155	29,623,272
Treasury Stock (in shares)	3,564,504	3,518,607

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net revenue	$ 509,763	$ 420,486	$ 1,434,927	$ 1,211,756
Cost of sales	353,879	288,839	1,001,730	836,710
Gross profit	155,884	131,647	433,197	375,046
Operating expenses
Selling	24,188	20,843	67,677	60,209
Administrative	68,056	58,240	199,607	177,495
Amortization	9,224	6,974	26,798	20,378
Operating income	54,416	45,590	139,115	116,964
Other expense, net
Interest expense, net	7,687	7,564	22,781	22,679
Other (income) expense	(483)	176	(494)	305
Income before income taxes	47,212	37,850	116,828	93,980
Income tax provision	12,320	9,773	27,432	24,578
Net income	34,892	28,077	89,396	69,402
Other comprehensive income (loss), net of tax:
Net change on cash flow hedges, net of tax (provision) benefit of $(454) and $(408) for the three months ended September 30, 2021 and 2020, respectively, and $(2,638) and $1,582 for the nine months ended September 30, 2021 and 2020, respectively	1,292	1,176	7,762	(4,582)
Comprehensive income	$ 36,184	$ 29,253	$ 97,158	$ 64,820
Basic net income per share (in USD per share)	$ 1.19	$ 0.95	$ 3.05	$ 2.35
Diluted net income per share (in USD per share)	$ 1.18	$ 0.95	$ 3.02	$ 2.33
Weighted average shares outstanding:
Basic (in shares)	29,404,257	29,478,816	29,355,538	29,549,460
Diluted (in shares)	29,620,748	29,698,028	29,615,162	29,737,716
Cash dividends declared per share (in USD per share)	$ 0.30	$ 0	$ 0.90	$ 0

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Unrealized loss on cash flow hedge, tax benefit	$ 454	$ 408	$ 2,638	$ (1,582)

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid In Capital	Retained Earnings	Retained EarningsCumulative Effect, Period of Adoption, Adjustment	Treasury Stock	Accumulated  Other Comprehensive Loss
BEGINNING BALANCE (in shares) at Dec. 31, 2019			32,871,504
BEGINNING BALANCE at Dec. 31, 2019	$ 250,031	$ (1,190)	$ 329	$ 190,230	$ 173,371	$ (1,190)		$ (7,143)
BEGINING BALANCE, Treasury Stock (in shares) at Dec. 31, 2019							(2,855,164)
BEGINING BALANCE, Treasury Stock at Dec. 31, 2019							$ (106,756)
Net income	69,402				69,402
Issuance of common stock awards to employees (in shares)			249,435
Issuance of common stock awards to employees	0		$ 2	(2)
Surrender of common stock awards (in shares)							(29,069)
Surrender of common stock awards	(973)						$ (973)
Share-based compensation expense	7,029			7,029
Share-based compensation issued to directors (in shares)			6,371
Share-based compensation issued to directors	$ 229			229
Common stock repurchase (in shares)	(443,000)						(442,542)
Common stock repurchase	$ (15,759)						$ (15,759)
Other comprehensive income (loss), net of tax	(4,582)							(4,582)
ENDING BALANCE (in shares) at Sep. 30, 2020			33,127,310
ENDING BALANCE at Sep. 30, 2020	304,187		$ 331	197,486	241,583			(11,725)
ENDING BALANCE, Treasury Stock (in shares) at Sep. 30, 2020							(3,326,775)
ENDING BALANCE, Treasury Stock at Sep. 30, 2020							$ (123,488)
BEGINNING BALANCE (in shares) at Jun. 30, 2020			33,124,237
BEGINNING BALANCE at Jun. 30, 2020	272,736		$ 331	195,288	213,506			(12,901)
BEGINING BALANCE, Treasury Stock (in shares) at Jun. 30, 2020							(3,325,049)
BEGINING BALANCE, Treasury Stock at Jun. 30, 2020							$ (123,488)
Net income	28,077				28,077
Issuance of common stock awards to employees (in shares)			3,073
Issuance of common stock awards to employees	0
Surrender of common stock awards (in shares)							(1,726)
Surrender of common stock awards	0
Share-based compensation expense	2,094			2,094
Share-based compensation issued to directors (in shares)
Share-based compensation issued to directors	104			104
Other comprehensive income (loss), net of tax	1,176							1,176
ENDING BALANCE (in shares) at Sep. 30, 2020			33,127,310
ENDING BALANCE at Sep. 30, 2020	$ 304,187		$ 331	197,486	241,583			(11,725)
ENDING BALANCE, Treasury Stock (in shares) at Sep. 30, 2020							(3,326,775)
ENDING BALANCE, Treasury Stock at Sep. 30, 2020							$ (123,488)
BEGINNING BALANCE (in shares) at Dec. 31, 2020	33,141,879		33,141,879
BEGINNING BALANCE at Dec. 31, 2020	$ 319,182		$ 331	199,847	269,420			(8,763)
BEGINING BALANCE, Treasury Stock (in shares) at Dec. 31, 2020	(3,518,607)						(3,518,607)
BEGINING BALANCE, Treasury Stock at Dec. 31, 2020	$ (141,653)						$ (141,653)
Net income	89,396				89,396
Issuance of common stock awards to employees (in shares)			125,550
Issuance of common stock awards to employees	0		$ 2	(2)
Surrender of common stock awards (in shares)							(45,897)
Surrender of common stock awards	(5,575)						$ (5,575)
Share-based compensation expense	8,351			8,351
Share-based compensation issued to directors (in shares)			4,230
Share-based compensation issued to directors	339			339
Dividends declared	$ (26,729)				(26,729)
Common stock repurchase (in shares)	0
Other comprehensive income (loss), net of tax	$ 7,762							7,762
ENDING BALANCE (in shares) at Sep. 30, 2021	33,271,659		33,271,659
ENDING BALANCE at Sep. 30, 2021	$ 392,726		$ 333	208,535	332,087			(1,001)
ENDING BALANCE, Treasury Stock (in shares) at Sep. 30, 2021	(3,564,504)						(3,564,504)
ENDING BALANCE, Treasury Stock at Sep. 30, 2021	$ (147,228)						$ (147,228)
BEGINNING BALANCE (in shares) at Jun. 30, 2021			33,264,517
BEGINNING BALANCE at Jun. 30, 2021	362,540		$ 333	205,597	306,107			(2,293)
BEGINING BALANCE, Treasury Stock (in shares) at Jun. 30, 2021							(3,562,942)
BEGINING BALANCE, Treasury Stock at Jun. 30, 2021							$ (147,204)
Net income	34,892				34,892
Issuance of common stock awards to employees (in shares)			7,142
Issuance of common stock awards to employees	0
Surrender of common stock awards (in shares)							(1,562)
Surrender of common stock awards	(24)						$ (24)
Share-based compensation expense	2,812			2,812
Share-based compensation issued to directors (in shares)
Share-based compensation issued to directors	126			126
Dividends declared	(8,912)				(8,912)
Other comprehensive income (loss), net of tax	$ 1,292							1,292
ENDING BALANCE (in shares) at Sep. 30, 2021	33,271,659		33,271,659
ENDING BALANCE at Sep. 30, 2021	$ 392,726		$ 333	$ 208,535	$ 332,087			$ (1,001)
ENDING BALANCE, Treasury Stock (in shares) at Sep. 30, 2021	(3,564,504)						(3,564,504)
ENDING BALANCE, Treasury Stock at Sep. 30, 2021	$ (147,228)						$ (147,228)

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - $ / shares	Aug. 05, 2021	May 05, 2021	Feb. 23, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Dividends declared (in USD per share)	$ 0.30	$ 0.30	$ 0.30	$ 0.30	$ 0	$ 0.90	$ 0

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities
Net income	$ 89,396	$ 69,402
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization of property and equipment	32,498	30,850
Amortization of operating lease right-of-use assets	16,464	13,281
Amortization of intangibles	26,798	20,378
Amortization of deferred financing costs and debt discount	993	1,000
Provision for credit losses	1,135	3,839
Gain on sale of property and equipment	(1,405)	(592)
Noncash stock compensation	10,228	8,050
Deferred income taxes	0	(3,405)
Amortization of terminated interest rate swap		508
Changes in assets and liabilities, excluding effects of acquisitions
Accounts receivable	(23,224)	(9,624)
Inventories	(37,122)	5,983
Other assets	(8,116)	9,027
Accounts payable	14,120	(14,746)
Income taxes receivable/payable	(107)	14,192
Other liabilities	(7,594)	(4,259)
Net cash provided by operating activities	116,478	143,884
Cash flows from investing activities
Purchases of investments	0	(776)
Maturities of short term investments	0	37,473
Purchases of property and equipment	(27,898)	(25,515)
Acquisitions of businesses, net of cash acquired of $1,640 and $0 in 2021 and 2020, respectively	(94,500)	(38,825)
Proceeds from sale of property and equipment	2,219	828
Other	(1,430)	(2,662)
Net cash used in investing activities	(121,609)	(29,477)
Cash flows from financing activities
Proceeds from vehicle and equipment notes payable	20,753	17,759
Debt issuance costs	0	(157)
Principal payments on long-term debt	(19,688)	(19,801)
Principal payments on finance lease obligations	(1,573)	(1,998)
Dividends paid	(26,428)	0
Acquisition-related obligations	(2,442)	(3,896)
Repurchase of common stock	0	(15,759)
Surrender of common stock awards by employees	(5,576)	(973)
Net cash used in financing activities	(34,954)	(24,825)
Net change in cash and cash equivalents	(40,085)	89,582
Cash and cash equivalents at beginning of period	231,520	177,889
Cash and cash equivalents at end of period	191,435	267,471
Supplemental disclosures of cash flow information
Interest	23,748	24,130
Income taxes, net of refunds	27,428	13,798
Supplemental disclosure of noncash activities
Right-of-use assets obtained in exchange for operating lease obligations	23,543	18,340
Release of indemnification of acquisition-related debt	2,036	0
Property and equipment obtained in exchange for finance lease obligations	1,918	853
Seller obligations in connection with acquisition of businesses	18,987	6,965
Unpaid purchases of property and equipment included in accounts payable	$ 1,327	$ 1,229

CONDENSED CONSOLIDATED STATEM_6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from investing activities
Cash acquired, net	$ 1,640	$ 0

Organization

Organization	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	ORGANIZATION Installed Building Products (“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, window blinds, shower doors, closet shelving and mirrors and other products for residential and commercial builders located in the continental United States. The Company operates in more than 190 locations and its corporate office is located in Columbus, Ohio. We have one operating segment and a single reportable segment. Substantially all of our sales are derived from the service-based installation of various products in the residential new construction, repair and remodel and commercial construction end markets from our national network of branch locations. Each of our branches has the capacity to serve all of our end markets. See Note 3, Revenue Recognition, for information on our revenues by product and end market. The COVID-19 pandemic ("COVID-19") has caused significant volatility, uncertainty and economic disruption. Many public health organizations and international, federal, state and local governments implemented measures to combat the spread of COVID-19 during portions of 2020 and 2021 with some of these restrictions still in place as of the date of filing of this Quarterly Report on Form 10-Q. Some of these measures include restrictions on movement such as quarantines, “stay-at-home” orders and social distancing ordinances and restricting or prohibiting outright some or all forms of commercial and business activity. We do not believe the various orders and restrictions significantly impacted our business in the first nine months of 2021. However, COVID-19 has caused disruptions in the building products supply chain, impacting our ability to purchase certain materials we install through typical channels. The extent to which COVID-19 will impact our future operations, customers, suppliers, employees and financial results is uncertain. The future impact on our financial results will depend on numerous factors including government actions and the resulting impact on construction activity, the effect on our customers’ demand for our services, the effects on our supply chain for materials, and the ability of our customers to pay for our services.

Significant Accounting Policies

Significant Accounting Policies	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Significant Accounting Policies	SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation and Principles of Consolidation The accompanying 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 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 audited 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, 2020 (the “2020 Form 10-K”), as filed with the SEC on February 24, 2021. The December 31, 2020 Condensed Consolidated Balance Sheet data herein was derived from the audited consolidated 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, 2021 are not necessarily indicative of the results to be expected in future operating quarters. Note 2 to the audited consolidated financial statements in our 2020 Form 10-K describes the significant accounting policies and estimates used in preparation of the audited consolidated financial statements. Other than the recently implemented accounting policies described below, there have been no changes to our significant accounting policies during the three or nine months ended September 30, 2021. Recently Adopted Accounting Pronouncements Standard Effective Date Adoption ASU 2021-01, Reference Rate Reform (Topic 848):Scope Effective upon issuance This pronouncement clarifies the scope and application of ASU 2020-04, "Reference Rate Reform: Facilitation of the Effects of Reference Rate Reform on Financial Reporting (Topic 848)." We continue to evaluate the impact of Topic 848 and may apply other elections as applicable as additional changes in the market occur. ASU 2019-12, Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes January 1, 2021 This pronouncement simplifies the accounting for income taxes by removing certain exceptions to the general principles of Topic 740 and improves the consistent application of GAAP by clarifying and amending existing guidance. The adoption of this standard did not impact our financial statements or have a material effect on our disclosures.

Revenue Recognition

Revenue Recognition	9 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Revenue Recognition	REVENUE RECOGNITION Our revenues are derived primarily through contracts with customers whereby we install insulation and other complementary building products and are recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. We account for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. An insignificant portion of our sales, primarily retail sales, is accounted for on a point-in-time basis when the sale occurs, adjusted accordingly for any return provisions. We do offer assurance-type warranties on certain of our installed products and services that do not represent a separate performance obligation and, as such, do not impact the timing or extent of revenue recognition. For contracts that are not complete at the reporting date, we recognize revenue over time utilizing a cost-to-cost input method as we believe this represents the best measure of when goods and services are transferred to the customer. When this method is used, we estimate the costs to complete individual contracts and record as revenue that portion of the total contract price that is considered complete based on the relationship of costs incurred to date to total anticipated costs. Under the cost-to-cost method, the use of estimated costs to complete each contract is a significant variable in the process of determining recognized revenue, requires judgment and can change throughout the duration of a contract due to contract modifications and other factors impacting job completion. 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. Our long-term contracts can be subject to modification to account for changes in contract specifications and requirements. We consider contract modifications to exist when the modification either creates new, or changes the existing, enforceable rights and obligations. Most of our contract modifications are for goods or services that are not distinct from the existing contract due to the significant integration service provided in the context of the contract and are accounted for as if they were part of that existing contract. The effect of a contract modification on the transaction price and our measure of progress for the performance obligation to which it relates, is recognized as an adjustment to revenue (either as an increase in or a reduction of revenue) on a cumulative catch-up basis. Payment terms typically do not exceed 30 days for short-term contracts and typically do not exceed 60 days for long-term contracts with customers. All contracts are billed either contractually or as work is performed. Billing on our long-term contracts occurs primarily on a monthly basis throughout the contract period whereby we submit invoices for customer payment based on actual or estimated costs incurred during the billing period. On certain of our long-term contracts the customer may withhold payment on an invoice equal to a percentage of the invoice amount, which will be subsequently paid after satisfactory completion of each installation project. This amount is referred to as retainage and is common practice in the construction industry, as it allows for customers to ensure the quality of the service performed prior to full payment. Retainage receivables are classified as current or long-term assets based on the expected time to project completion. We disaggregate our revenue from contracts with customers by end market and product, as we believe it best depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors. The following tables present our revenues disaggregated by end market and product (in thousands): Three months ended September 30, Nine months ended September 30, 2021 2020 2021 2020 Residential new construction $ 386,346 76 % $ 315,434 75 % $ 1,091,414 76 % $ 912,095 75 % Repair and remodel 34,506 7 % 28,625 7 % 94,142 7 % 75,702 6 % Commercial 88,911 17 % 76,427 18 % 249,371 17 % 223,959 19 % Net revenue $ 509,763 100 % $ 420,486 100 % $ 1,434,927 100 % $ 1,211,756 100 % Three months ended September 30, Nine months ended September 30, 2021 2020 2021 2020 Insulation $ 324,360 64 % $ 268,292 64 % $ 921,181 64 % $ 779,045 64 % Waterproofing 34,514 7 % 33,272 8 % 98,727 7 % 89,855 7 % Shower doors, shelving and mirrors 35,411 7 % 29,282 7 % 101,830 7 % 85,199 7 % Garage doors 26,951 5 % 24,001 6 % 77,434 5 % 68,655 6 % Rain gutters 21,807 4 % 17,295 4 % 62,270 4 % 41,942 4 % Fireproofing/firestopping (1) 17,684 3 % 11,047 2 % 43,156 3 % 36,325 3 % Window blinds 13,197 3 % 12,166 3 % 37,398 3 % 34,651 3 % Other building products 35,839 7 % 25,131 6 % 92,931 7 % 76,084 6 % Net revenue $ 509,763 100 % $ 420,486 100 % $ 1,434,927 100 % $ 1,211,756 100 % (1) Combined with "Other building products" in previous years. Contract Assets and Liabilities Our contract assets consist of unbilled amounts typically resulting from sales under contracts when the cost-to-cost method of revenue recognition is utilized and revenue recognized, based on costs incurred, exceeds the amount billed to the customer. Our contract assets are recorded in other current assets in our Condensed Consolidated Balance Sheets. Our contract liabilities consist of customer deposits and billings in excess of revenue recognized, based on costs incurred and are included in other current liabilities in our Condensed Consolidated Balance Sheets. Contract assets and liabilities related to our uncompleted contracts and customer deposits were as follows (in thousands): September 30, 2021 December 31, 2020 Contract assets $ 32,265 $ 24,334 Contract liabilities (10,611) (8,965) Uncompleted contracts were as follows (in thousands): September 30, 2021 December 31, 2020 Costs incurred on uncompleted contracts $ 216,929 $ 169,544 Estimated earnings 112,854 90,737 Total 329,783 260,281 Less: Billings to date 301,626 240,665 Net under billings $ 28,157 $ 19,616 Net under billings were as follows (in thousands): September 30, 2021 December 31, 2020 Costs and estimated earnings in excess of billings on uncompleted contracts (contract assets) $ 32,265 $ 24,334 Billings in excess of costs and estimated earnings on uncompleted contracts (contract liabilities) (4,108) (4,718) Net under billings $ 28,157 $ 19,616 The difference between contract assets and contract liabilities as of September 30, 2021 compared to December 31, 2020 is primarily the result of timing differences between our performance of obligations under contracts and customer payments. During the three and nine months ended September 30, 2021, we recognized $0.1 million and $8.6 million of revenue that was included in the contract liability balance at December 31, 2020. We did not recognize any impairment losses on our receivables and contract assets during the three and nine months ended September 30, 2021 or 2020. Remaining performance obligations represent the transaction price of contracts for which work has not been performed and excludes unexercised contract options and potential modifications. As of September 30, 2021, the aggregate amount of the transaction price allocated to remaining uncompleted contracts was $94.9 million. We expect to satisfy remaining performance obligations and recognize revenue on substantially all of these uncompleted contracts over the next 18 months. Practical Expedients and Exemptions We generally expense sales commissions and other incremental costs of obtaining a contract when incurred because the amortization period is usually one year or less. Sales commissions are recorded within selling expenses on the Condensed Consolidated Statements of Operations and Comprehensive Income. We do not disclose the value of unsatisfied performance obligations for contracts with an original expected length of one year or less.

Credit Losses

Credit Losses	9 Months Ended
	Sep. 30, 2021
Credit Loss [Abstract]
Credit Losses	CREDIT LOSSES Our expected loss allowance methodology for accounts receivable is developed using historical losses, current economic conditions and future market forecasts. We also perform ongoing evaluations of our existing and potential customer’s creditworthiness. To date, the COVID-19 pandemic has not had a material impact on the collectability of our existing trade receivables. Changes in our allowance for credit losses were as follows (in thousands): Balance as of January 1, 2021 $ 8,789 Current period provision 1,135 Recoveries collected and additions 506 Amounts written off (1,646) Balance as of September 30, 2021 $ 8,784

Cash and Cash Equivalents

Cash and Cash Equivalents	9 Months Ended
	Sep. 30, 2021
Cash and Cash Equivalents [Abstract]
CASH AND CASH EQUIVALENTS	CASH AND CASH EQUIVALENTSCash and cash equivalents include highly liquid instruments with insignificant interest rate risk and original or remaining maturities of three months or less at the time of purchase. These instruments were $166.5 million and $170.4 million as of September 30, 2021 and December 31, 2020, respectively. See Note 9, Fair Value Measurements, for additional information.

Goodwill and Intangibles

Goodwill and Intangibles	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangibles	GOODWILL AND INTANGIBLES We anticipate that the COVID-19 pandemic could continue to have an impact on the homebuilding industry in general, as it could result in further business interruptions (government-mandated or otherwise) and could affect, among other factors, employment levels, consumer spending and consumer confidence, which could decrease demand for homes, adversely affecting our business. As such, we considered whether impairment indicators arose through the date of filing of this Quarterly Report on Form 10-Q for our goodwill, long-lived assets and other intangible assets and concluded that no such factors existed to cause us to test for goodwill impairment during the nine months ended September 30, 2021. While we ultimately concluded that our goodwill, long-lived assets and other intangibles assets were not impaired as of September 30, 2021, we will continue to assess impairment indicators related to the impact of the COVID-19 pandemic on our business. Goodwill The change in carrying amount of goodwill was as follows (in thousands): Goodwill Accumulated Goodwill January 1, 2021 $ 286,874 $ (70,004) $ 216,870 Business Combinations 40,206 — 40,206 Other 30 — 30 September 30, 2021 $ 327,110 $ (70,004) $ 257,106 Other changes included in the above table primarily include minor adjustments for the purchase price allocation of certain acquisitions still under measurement. For additional information regarding changes to goodwill resulting from acquisitions, see Note 16, Business Combinations. We test goodwill for impairment annually during the fourth quarter of our fiscal year or earlier if there is an impairment indicator. Accumulated impairment losses included within the above table were incurred over multiple periods, with the latest impairment charge being recorded during the year ended December 31, 2010. Intangibles, net The following table provides the gross carrying amount, accumulated amortization and net book value for each major class of intangibles (in thousands): As of September 30, As of December 31, 2021 2020 Gross Accumulated Net Gross Accumulated Net Amortized intangibles: Customer relationships $ 240,756 $ 106,997 $ 133,759 $ 197,641 $ 89,137 $ 108,504 Covenants not-to-compete 24,973 15,628 9,345 20,309 13,436 6,873 Trademarks and tradenames 89,804 31,164 58,640 79,657 27,245 52,412 Backlog 20,425 18,069 2,356 18,847 15,243 3,604 $ 375,958 $ 171,858 $ 204,100 $ 316,454 $ 145,061 $ 171,393 The gross carrying amount of intangibles increased approximately $59.5 million during the nine months ended September 30, 2021 primarily due to business combinations. For more information, see Note 16, Business Combinations. Remaining estimated aggregate annual amortization expense is as follows (amounts, in thousands, are for the fiscal year ended): Remainder of 2021 $ 9,509 2022 34,971 2023 30,650 2024 27,136 2025 21,731 Thereafter 80,103

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Long-Term Debt	LONG-TERM DEBT Long-term debt consisted of the following (in thousands): As of September 30, As of December 31, 2021 2020 Senior Notes due 2028, net of unamortized debt issuance costs of $3,783 and $4,230, respectively $ 296,217 $ 295,770 Term Loan, net of unamortized debt issuance costs of $1,094 and $1,343, respectively 198,906 198,657 Vehicle and equipment notes, maturing through September 2026; payable in various monthly installments, including interest rates ranging from 1.9% to 4.8% 68,759 67,493 Various notes payable, maturing through March 2025; payable in various monthly installments, including interest rates ranging from 2.0% to 5.0% 3,192 3,392 567,074 565,312 Less: current maturities (24,557) (23,355) Long-term debt, less current maturities $ 542,517 $ 541,957 Remaining required repayments of debt principal, gross of unamortized debt issuance costs, as of September 30, 2021 are as follows (in thousands): Remainder of 2021 $ 6,425 2022 23,548 2023 18,477 2024 12,684 2025 209,147 Thereafter 301,670 5.75% Senior Notes due 2028 In September 2019, we issued $300.0 million in aggregate principal amount of 5.75% senior unsecured notes (the “Senior Notes”). The Senior Notes will mature on February 1, 2028 and interest is payable semi-annually in cash in arrears on February 1 and August 1 each year until maturity. The indenture covering the Senior Notes contains restrictive covenants that, among other things, limit the ability of the Company and certain of our subsidiaries (subject to certain exceptions) to: (i) incur additional debt and issue preferred stock; (ii) pay dividends on, redeem or repurchase stock in an aggregate amount exceeding 2.0% of market capitalization per fiscal year, or in an aggregate amount exceeding certain applicable restricted payment baskets; (iii) prepay subordinated debt; (iv) create liens; (v) make specified types of investments; (vi) apply net proceeds from certain asset sales; (vii) engage in transactions with affiliates; (viii) merge, consolidate or sell substantially all of our assets; and (ix) pay dividends and make other distributions from subsidiaries. Credit Facilities In December 2019, we amended and restated our $400.0 million, seven-year term loan facility due April 2025 (the “Term Loan”) under our credit agreement (the “Term Loan Agreement”), dated as of April 13, 2017 (as previously amended by the First Amendment thereto dated November 30, 2017 and by the Second Amendment thereto dated June 19, 2018). The amended Term Loan (i) effects a repricing of the interest rate applicable to the term loans thereunder from LIBOR plus 2.50% to LIBOR plus 2.25% and (ii) replaces Royal Bank of Canada with Bank of America, N.A. as the administrative agent and collateral agent thereunder. As of September 30, 2021, we had $198.9 million, net of unamortized debt issuance costs, due on our Term Loan. The amended Term Loan also has a margin of 1.25% in the case of base rate loans. In September 2019, we entered into a new asset-based lending credit agreement (the “ABL Credit Agreement”). The ABL Credit Agreement provides for an asset-based lending credit facility (the “ABL Revolver”) of up to $200.0 million with a five-year maturity, which replaced the Company’s previous revolving credit facility. Borrowing availability under the ABL Revolver is based on a percentage of the value of certain assets securing the Company’s obligations and those of the subsidiary guarantors thereunder. In connection with the Amended and Restated Term Loan, we entered into a Second Amendment (the “Second Amendment”) to the ABL/Term Loan Intercreditor Agreement with Bank of America, N.A., as ABL Agent for the lenders under the ABL Credit Agreement, and Bank of America, N.A., as Term Loan Agent for the lenders under the Amended and Restated Term Loan. Including outstanding letters of credit, our remaining availability under the ABL Revolver as of September 30, 2021 was $155.7 million. All of the obligations under the Term Loan and ABL Revolver are guaranteed by all of the Company’s existing restricted subsidiaries and will be guaranteed by the Company’s future restricted subsidiaries. Additionally, all obligations under the Term Loan and ABL Revolver, and the guarantees of those obligations, are secured by substantially all of the assets of the Company and the guarantors, subject to certain exceptions and permitted liens, including a first-priority security interest in such assets that constitute ABL Priority Collateral, as defined in the ABL Credit Agreement, and a second-priority security interest in such assets that constitute Term Loan Priority Collateral, as defined in the Term Loan Agreement. The ABL Revolver bears interest at either the Eurodollar rate or the base rate (which approximated the prime rate), at the Company’s election, plus a margin of (A) 1.25% or 1.50% in the case of Eurodollar rate loans (based on a measure of availability under the ABL Credit Agreement) and (B) 0.25% or 0.50% in the case of base rate loans (based on a measure of availability under the ABL Credit Agreement). The ABL Revolver also provides incremental revolving credit facility commitments of up to $50.0 million. The terms and conditions of any incremental revolving credit facility commitments must be no more favorable than the terms of the ABL Revolver. The ABL Revolver also allows for the issuance of letters of credit of up to $75.0 million in aggregate and borrowing of swingline loans of up to $20.0 million in aggregate. The ABL Credit Agreement contains a financial covenant requiring the satisfaction of a minimum fixed charge coverage ratio of 1.0x in the event that we do not meet a minimum measure of availability under the ABL Revolver. The ABL Credit Agreement and the Term Loan Agreement contain restrictive covenants that, among other things, limit the ability of the Company and certain of our subsidiaries (subject to certain exceptions) to: (i) incur additional debt and issue preferred stock; (ii) pay dividends on, redeem or repurchase stock in an aggregate amount exceeding 2.0% of market capitalization per fiscal year, or in an aggregate amount exceeding certain applicable restricted payment baskets; (iii) prepay subordinated debt; (iv) create liens; (v) make specified types of investments; (vi) apply net proceeds from certain asset sales; (vii) engage in transactions with affiliates; (viii) merge, consolidate or sell substantially all of our assets; and (ix) pay dividends and make other distributions from subsidiaries. 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” and together with the Master Loan and Security Agreement and Master Equipment Agreement, the “Master Loan and Equipment 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. Total gross assets relating to our Master Loan and Equipment Agreements were $135.4 million and $132.2 million as of September 30, 2021 and December 31, 2020, respectively. The net book value of assets under these agreements was $66.4 million and $65.7 million as of September 30, 2021 and December 31, 2020, respectively. Depreciation of assets held under these agreements is included within cost of sales on the Condensed Consolidated Statements of Operations and Comprehensive Income.

Leases

Leases	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Leases	LEASES We lease various assets in the ordinary course of business as follows: warehouses to store our materials and perform staging activities for certain products we install, various office spaces for selling and administrative activities to support our business, and certain vehicles and equipment to facilitate our operations, including, but not limited to, trucks, forklifts and office equipment. The table below presents the lease-related assets and liabilities recorded on the Condensed Consolidated Balance Sheets: As of September 30, As of December 31, (in thousands) Classification 2021 2020 Assets Non-Current Operating Operating lease right-of-use assets $ 61,028 $ 53,766 Finance Property and equipment, net 5,019 4,946 Total lease assets $ 66,047 $ 58,712 Liabilities Current Operating Current maturities of operating lease obligations $ 21,278 $ 18,758 Financing Current maturities of finance lease obligations 1,780 2,073 Non-Current Operating Operating lease obligations 39,155 34,413 Financing Finance lease obligations 3,038 2,430 Total lease liabilities $ 65,251 $ 57,674 Weighted-average remaining lease term: Operating leases 3.9 years 4.1 years Finance leases 3.2 years 2.6 years Weighted-average discount rate: Operating leases 3.37 % 3.67 % Finance leases 4.95 % 5.08 % + Lease Costs The table below presents certain information related to the lease costs for finance and operating leases: Three months ended September 30, Nine months ended September 30, (in thousands) Classification 2021 2020 2021 2020 Operating lease cost (1) Administrative $ 6,927 $ 5,760 $ 19,947 $ 16,972 Finance lease cost Amortization of leased assets (2) Cost of sales 769 856 2,342 2,762 Interest on finance lease obligations Interest expense, net 54 64 161 207 Total lease costs $ 7,750 $ 6,680 $ 22,450 $ 19,941 (1) Includes variable lease costs of $0.7 million and $0.6 million for the three months ended September 30, 2021 and 2020, respectively, and $2.2 million and $1.9 million for the nine months ended September 30, 2021 and 2020, respectively, and short-term lease costs of $0.3 million and $0.2 million for the three months ended September 30, 2021 and 2020, respectively, and $0.8 million and $0.6 million for the nine months ended September 30, 2021 and 2020, respectively. (2) Includes variable lease costs of $0.2 million for each of the three months ended September 30, 2021 and 2020, and $0.5 million and $0.6 million for each of the nine months ended September 30, 2021 and 2020. Other Information The table below presents supplemental cash flow information related to leases (in thousands): Three months ended September 30, Nine months ended September 30, 2021 2020 2021 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 5,821 $ 4,949 $ 16,763 $ 14,501 Operating cash flows for finance leases 54 64 161 207 Financing cash flows for finance leases 532 606 1,573 1,998 Undiscounted Cash Flows The table below reconciles the undiscounted cash flows for each of the first five years and total of the remaining years for the finance lease obligations and operating lease obligations recorded on the Condensed Consolidated Balance Sheet as of September 30, 2021 (in thousands): Finance Leases Operating Leases Related Party Other Total Operating Remainder of 2021 $ 661 $ 342 $ 5,696 $ 6,038 2022 1,751 1,347 20,432 21,779 2023 1,278 906 14,878 15,784 2024 869 645 8,112 8,757 2025 501 519 4,481 5,000 Thereafter 200 — 7,496 7,496 Total minimum lease payments 5,260 $ 3,759 $ 61,095 64,854 Less: Amounts representing executory costs (36) Less: Amounts representing interest (406) (4,421) Present value of future minimum lease payments 4,818 60,433 Less: Current obligation under leases (1,780) (21,278) Long-term lease obligations $ 3,038 $ 39,155
Leases	LEASES We lease various assets in the ordinary course of business as follows: warehouses to store our materials and perform staging activities for certain products we install, various office spaces for selling and administrative activities to support our business, and certain vehicles and equipment to facilitate our operations, including, but not limited to, trucks, forklifts and office equipment. The table below presents the lease-related assets and liabilities recorded on the Condensed Consolidated Balance Sheets: As of September 30, As of December 31, (in thousands) Classification 2021 2020 Assets Non-Current Operating Operating lease right-of-use assets $ 61,028 $ 53,766 Finance Property and equipment, net 5,019 4,946 Total lease assets $ 66,047 $ 58,712 Liabilities Current Operating Current maturities of operating lease obligations $ 21,278 $ 18,758 Financing Current maturities of finance lease obligations 1,780 2,073 Non-Current Operating Operating lease obligations 39,155 34,413 Financing Finance lease obligations 3,038 2,430 Total lease liabilities $ 65,251 $ 57,674 Weighted-average remaining lease term: Operating leases 3.9 years 4.1 years Finance leases 3.2 years 2.6 years Weighted-average discount rate: Operating leases 3.37 % 3.67 % Finance leases 4.95 % 5.08 % + Lease Costs The table below presents certain information related to the lease costs for finance and operating leases: Three months ended September 30, Nine months ended September 30, (in thousands) Classification 2021 2020 2021 2020 Operating lease cost (1) Administrative $ 6,927 $ 5,760 $ 19,947 $ 16,972 Finance lease cost Amortization of leased assets (2) Cost of sales 769 856 2,342 2,762 Interest on finance lease obligations Interest expense, net 54 64 161 207 Total lease costs $ 7,750 $ 6,680 $ 22,450 $ 19,941 (1) Includes variable lease costs of $0.7 million and $0.6 million for the three months ended September 30, 2021 and 2020, respectively, and $2.2 million and $1.9 million for the nine months ended September 30, 2021 and 2020, respectively, and short-term lease costs of $0.3 million and $0.2 million for the three months ended September 30, 2021 and 2020, respectively, and $0.8 million and $0.6 million for the nine months ended September 30, 2021 and 2020, respectively. (2) Includes variable lease costs of $0.2 million for each of the three months ended September 30, 2021 and 2020, and $0.5 million and $0.6 million for each of the nine months ended September 30, 2021 and 2020. Other Information The table below presents supplemental cash flow information related to leases (in thousands): Three months ended September 30, Nine months ended September 30, 2021 2020 2021 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 5,821 $ 4,949 $ 16,763 $ 14,501 Operating cash flows for finance leases 54 64 161 207 Financing cash flows for finance leases 532 606 1,573 1,998 Undiscounted Cash Flows The table below reconciles the undiscounted cash flows for each of the first five years and total of the remaining years for the finance lease obligations and operating lease obligations recorded on the Condensed Consolidated Balance Sheet as of September 30, 2021 (in thousands): Finance Leases Operating Leases Related Party Other Total Operating Remainder of 2021 $ 661 $ 342 $ 5,696 $ 6,038 2022 1,751 1,347 20,432 21,779 2023 1,278 906 14,878 15,784 2024 869 645 8,112 8,757 2025 501 519 4,481 5,000 Thereafter 200 — 7,496 7,496 Total minimum lease payments 5,260 $ 3,759 $ 61,095 64,854 Less: Amounts representing executory costs (36) Less: Amounts representing interest (406) (4,421) Present value of future minimum lease payments 4,818 60,433 Less: Current obligation under leases (1,780) (21,278) Long-term lease obligations $ 3,038 $ 39,155

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS Assets and Liabilities Measured at Fair Value on a Recurring Basis In many cases, a valuation technique used to measure fair value includes inputs from multiple levels of the fair value hierarchy. The lowest level of significant input determines the placement of the entire fair value measurement in the hierarchy. During the periods presented, there were no transfers between fair value hierarchical levels. Assets Measured at Fair Value on a Nonrecurring Basis Certain assets, specifically other intangible and long-lived assets, are measured at fair value on a nonrecurring basis in periods subsequent to initial recognition. Assets measured at fair value on a nonrecurring basis as of September 30, 2021 and December 31, 2020 are categorized based on the lowest level of significant input to the valuation. The assets are measured at fair value when our impairment assessment indicates a carrying value for each of the assets in excess of the asset’s estimated fair value. Undiscounted cash flows, a Level 3 input, are utilized in determining estimated fair values. During each of the three and nine months ended September 30, 2021 and 2020, we did not record any impairments on these assets required to be measured at fair value on a nonrecurring basis. Estimated Fair Value of Financial Instruments Accounts receivable, accounts payable and accrued liabilities as of September 30, 2021 and December 31, 2020 approximate fair value due to the short-term maturities of these financial instruments. The carrying amounts of certain long-term debt, including the Term Loan and ABL Revolver as of September 30, 2021 and December 31, 2020, approximate fair value due to the variable rate nature of the agreements. The carrying amounts of our operating lease right-of-use assets and the obligations associated with our operating and finance leases as well as our vehicle and equipment notes approximate fair value as of September 30, 2021 and December 31, 2020. All debt classifications represent Level 2 fair value measurements. Derivative financial instruments are measured at fair value based on observable market information and appropriate valuation methods. Contingent consideration liabilities arise from future earnout payments to the sellers associated with certain acquisitions and are based on predetermined calculations of certain future results. These future payments are estimated by considering various factors, including business risk and projections. The contingent consideration liabilities are measured at fair value by discounting estimated future payments, calculated based on a weighted average of various future forecast scenarios, to their net present value. The fair values of financial assets and liabilities that are recorded at fair value in the Condensed Consolidated Balance Sheets and not described above were as follows (in thousands): As of September 30, 2021 As of December 31, 2020 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Financial assets: Cash equivalents $ 166,473 $ 166,473 $ — $ — $ 170,398 $ 170,398 $ — $ — Derivative financial instruments 13,567 — 13,567 — 5,130 — 5,130 — Total financial assets $ 180,040 $ 166,473 $ 13,567 $ — $ 175,528 $ 170,398 $ 5,130 $ — Financial liabilities: Contingent consideration $ 8,591 $ — $ — $ 8,591 $ 4,004 $ — $ — $ 4,004 Derivative financial instruments 774 — 774 — 324 — 324 — Total financial liabilities $ 9,365 $ — $ 774 $ 8,591 $ 4,328 $ — $ 324 $ 4,004 See Note 5, Cash and Cash Equivalents, for more information on cash equivalents included in the table above. Also see Note 10, Derivatives and Hedging Activities, for more information on derivative financial instruments. The change in fair value of the contingent consideration (a Level 3 input) was as follows (in thousands): Contingent consideration liability - January 1, 2021 $ 4,004 Preliminary purchase price 6,000 Fair value adjustments (296) Accretion in value 845 Amounts cancelled (1,036) Amounts paid to sellers (926) Contingent consideration liability - September 30, 2021 $ 8,591 The accretion in value of contingent consideration liabilities is included within administrative expenses on the Condensed Consolidated Statements of Operations and Comprehensive Income. The carrying value and associated fair value of financial liabilities that are not recorded at fair value in the Condensed Consolidated Balance Sheets and not described above include our Senior Notes. To estimate the fair value of our Senior Notes, we utilized third-party quotes which are derived all or in part from model prices, external sources or market prices. The Senior Notes represents a Level 2 fair value measurement and is as follows (in thousands): As of September 30, 2021 As of December 31, 2020 Carrying Value Fair Value Carrying Value Fair Value Senior Notes (1) $ 300,000 $ 316,197 $ 300,000 $ 320,013 (1) Excludes the impact of unamortized debt issuance costs. See Note 7, Long-Term Debt, for more information on our Senior Notes.

Derivatives and Hedging Activit

Derivatives and Hedging Activities	9 Months Ended
	Sep. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	DERIVATIVES AND HEDGING ACTIVITIES 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. During the nine months ended September 30, 2021, we used an interest rate swap to hedge the variable cash flows associated with existing variable-rate debt. 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. 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, 2021, we have not posted any collateral related to these agreements. In August 2020, we terminated our two existing interest rate swaps and our forward interest rate swap and simultaneously entered into a new forward interest rate swap that began July 30, 2021. The unrealized loss included in accumulated other comprehensive loss associated with the terminated swaps of $17.8 million at the time of termination will be amortized to interest expense over the course of the originally scheduled settlement dates of the terminated swaps. For the three and nine months ended September 30, 2021, we amortized $0.8 million and $2.4 million of the unrealized loss to interest expense, net. As of September 30, 2021, we had one interest rate swap with a fixed notional amount of $200.0 million, a fixed rate of 0.51% and a maturity date of April 15, 2030. This swap serves to hedge substantially all of the variable cash flows on our Term Loan until its maturity and if extended. The assets and liabilities associated with the interest rate swap are included in other long-term assets and other current liabilities on the Condensed Consolidated Balance Sheets at their fair value amounts as described in Note 9, Fair Value Measurements. The changes in the fair value of derivatives designated, and that qualify, as cash flow hedges are recorded in other comprehensive income (loss), net of tax on the Condensed Consolidated Statements of Operations and Comprehensive Income and in accumulated other comprehensive loss on the Condensed Consolidated Balance Sheets and subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. We had no such changes during the nine months ended September 30, 2021 or 2020. Amounts reported in accumulated other comprehensive loss related to derivatives will be reclassified to interest expense, net as interest payments are made on our variable-rate debt. Over the next twelve months, we estimate that an additional $4.3 million will be reclassified as an increase to interest expense, net. In anticipation of future debt refinancing, on October 27, 2021, we entered into two new forward interest rate swap derivatives. These forward interest rate swaps will begin on December 31, 2021. Each swap has a fixed notional amount of $100.0 million, a fixed rate of 1.37%, and a maturity date of December 15, 2028.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Stockholders' Equity	STOCKHOLDERS’ EQUITYAs of September 30, 2021 and December 31, 2020, we had losses of $1.0 million and $8.8 million, respectively, in accumulated other comprehensive loss on our Condensed Consolidated Balance Sheets. The loss as of September 30, 2021 represented the unrealized loss on our terminated interest rate swaps of $10.3 million, net of taxes, less the effective portion of the unrealized gain on our current interest rate swap of $9.3 million, net of taxes. The loss as of December 31, 2020 represented the unrealized loss on our terminated interest rate swaps of $12.2 million, net of taxes, less the effective portion of the unrealized gain on our forward interest rate swap of $3.4 million, net of taxes. For additional information, see Note 10, Derivatives and Hedging Activities. During the nine months ended September 30, 2020, we repurchased approximately 443 thousand shares of our common stock with an aggregate price of approximately $15.8 million, or $35.59 average price per share. We did not repurchase any shares during the nine months ended September 30, 2021. On February 22, 2021, our board of directors authorized an extension of our stock repurchase program through March 1, 2022 and concurrently authorized an increase in the total amount of our outstanding common stock we can purchase up to $100.0 million. As of September 30, 2021, we have $100.0 million remaining on our current stock repurchase program. The effect of these treasury shares in reducing the number of common shares outstanding is reflected in our earnings per share calculation. Dividends During the nine months ended September 30, 2021, we declared and paid the following cash dividends (amount declared and amount paid in thousands): Declaration Date Record Date Payment Date Dividend Per Share Amount Declared Amount Paid 2/23/2021 3/15/2021 3/31/2021 $ 0.30 $ 8,907 $ 8,786 5/5/2021 6/15/2021 6/30/2021 $ 0.30 $ 8,910 $ 8,821 8/5/2021 9/15/2021 9/30/2021 $ 0.30 $ 8,912 $ 8,821 The amount of dividends declared may vary from the amount of dividends paid in a period due to the vesting of restricted stock awards and performance share awards, which accrue dividend equivalent rights that are paid when the award vests. The payment of future dividends will be at the discretion of our board of directors and will depend on our future earnings, capital requirements, financial condition, future prospects, results of operations, contractual restrictions, legal requirements, and other factors deemed relevant by our board of directors. We did not declare or pay any cash dividends on our capital stock during the three or nine months ended September 30, 2020.

Employee Benefits

Employee Benefits	9 Months Ended
	Sep. 30, 2021
Postemployment Benefits [Abstract]
Employee Benefits	EMPLOYEE BENEFITS Healthcare We participate in multiple healthcare plans, the largest of which is partially self-funded with an insurance company paying benefits in excess of stop loss limits per individual/family. Our healthcare benefit expense (net of employee contributions) was approximately $6.5 million and $5.5 million for the three months ended September 30, 2021 and 2020, respectively, and $20.6 million and $18.2 million for the nine months ended September 30, 2021 and 2020, respectively, for all plans. An accrual for estimated healthcare claims incurred but not reported (“IBNR”) is included within accrued compensation on the Condensed Consolidated Balance Sheets and was $3.2 million and $3.1 million as of September 30, 2021 and December 31, 2020, respectively. Workers’ Compensation Workers’ compensation expense totaled $4.8 million and $4.1 million for the three months ended September 30, 2021 and 2020, respectively, and $11.9 million and $11.4 million for the nine months ended September 30, 2021 and 2020, respectively. Workers’ compensation known claims and IBNR reserves included on the Condensed Consolidated Balance Sheets were as follows (in thousands): September 30, 2021 December 31, 2020 Included in other current liabilities $ 6,775 $ 7,703 Included in other long-term liabilities 12,490 11,986 $ 19,265 $ 19,689 We also had an insurance receivable for claims that exceeded the stop loss limit under our self-insured policies as well as claims under our fully insured policies included on the Condensed Consolidated Balance Sheets. This receivable offsets an equal liability included within the reserve amounts noted above and was as follows (in thousands): September 30, 2021 December 31, 2020 Included in other non-current assets $ 2,082 $ 1,854 Retirement Plans We participate in multiple 401(k) plans, whereby we provide a matching contribution of wages deferred by employees and can also make discretionary contributions to each plan. Certain plans allow for discretionary employer contributions only. These plans cover substantially all our eligible employees. We recognized 401(k) plan expenses of $0.5 million and $0.4 million during the three months ended September 30, 2021 and 2020, respectively, and $1.9 million and $1.6 million during the nine months ended September 30, 2021 and 2020, respectively. These expenses are included in administrative expenses on the accompanying Condensed Consolidated Statements of Operations and Comprehensive Income. Multiemployer Pension Plans We participate in various multiemployer pension plans under collective bargaining agreements in Washington, Oregon and Illinois with other companies in the construction industry. These plans cover our union-represented employees and contributions to these plans are expensed as incurred. These plans generally provide for retirement, death and/or termination benefits for eligible employees within the applicable collective bargaining units, based on specific eligibility/participation requirements, vesting periods and benefit formulas. We do not participate in any multiemployer pension plans that are considered to be individually significant. Share-Based Compensation Common Stock Awards We periodically grant shares of our common stock to non-employee members of our board of directors and our employees. During the nine months ended September 30, 2021 and 2020, we granted approximately four thousand and six thousand shares of our common stock, respectively, under our 2014 Omnibus Incentive Plan to non-employee members of our board of directors. The stock will vest over a one year service period. In addition, we granted approximately seven thousand and three thousand shares during the three months ended September 30, 2021 and 2020, respectively and 0.1 million and 0.2 million shares of our common stock to employees during the nine months ended September 30, 2021 and 2020, respectively. Employees – Performance-Based Stock Awards During the nine months ended September 30, 2021, we issued approximately 0.1 million shares of our common stock to certain officers, which vest in two equal installments on each of April 20, 2022 and April 20, 2023. In addition, during the nine months ended September 30, 2021, we established, and our board of directors approved, performance-based targets in connection with common stock awards to be issued to certain officers in 2022 contingent upon achievement of these targets. In addition, there are long-term performance-based restricted stock awards to be issued to certain employees annually through 2022 contingent upon achievement of certain performance targets. These awards are 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 in the first quarter of 2022 and as such are included in other current liabilities on the Condensed Consolidated Balance Sheets. During the nine months ended September 30, 2021 and 2020, we granted approximately five thousand and seven thousand shares of our common stock, respectively, all of which will vest in 2022. Employees – Performance-Based Restricted Stock Units During 2020, we established, and our board of directors approved, performance-based restricted stock units in connection with common stock awards which were issued to certain employees in 2021 based upon achievement of a performance target. In addition, during the nine months ended September 30, 2021, 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 2022 based 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 Summary Amounts and changes for each category of equity-based award were as follows: Common Stock Awards Performance-Based Stock Awards Performance-Based Restricted Stock Awards Weighted Awards Weighted Units Weighted Nonvested awards/units at December 31, 2020 231,280 $ 48.05 166,961 $ 59.97 13,273 $ 36.51 Granted 55,815 124.88 42,449 123.32 8,470 126.89 Vested (84,254) 48.81 (64,525) 52.79 (12,952) 36.51 Forfeited/Cancelled (2,448) 57.85 — — (488) 67.44 Nonvested awards/units at September 30, 2021 200,393 $ 69.01 144,885 $ 81.73 8,303 $ 126.89 The following table summarizes the share-based compensation expense recognized under our 2014 Omnibus Incentive Plan (in thousands): Three months ended September 30, Nine months ended September 30, 2021 2020 2021 2020 Common Stock Awards $ 1,426 $ 997 $ 3,843 $ 3,006 Non-Employee Common Stock Awards 126 104 339 230 Performance-Based Stock Awards 1,128 928 3,462 2,844 Liability Performance-Based Stock Awards 598 488 1,983 1,554 Performance-Based Restricted Stock Units 257 118 601 416 $ 3,535 $ 2,635 $ 10,228 $ 8,050 We recorded the following stock compensation expense by income statement category (in thousands): Three months ended September 30, Nine months ended September 30, 2021 2020 2021 2020 Cost of sales $ 161 $ 60 $ 287 $ 221 Selling 56 45 145 154 Administrative 3,318 2,530 9,796 7,675 $ 3,535 $ 2,635 $ 10,228 $ 8,050 Administrative stock compensation expense includes all stock compensation earned by our administrative personnel, while cost of sales and selling stock compensation represents all stock compensation earned by our installation and sales employees, respectively. Unrecognized share-based compensation expense related to unvested awards was as follows (in thousands): As of September 30, 2021 Unrecognized Weighted Average Common Stock Awards $ 9,201 1.8 years Performance-Based Stock Awards 6,082 1.7 years Performance-Based Restricted Stock Units 553 0.5 years Total unrecognized compensation expense related to unvested awards $ 15,836 Total unrecognized compensation expense is subject to future adjustments for forfeitures. This expense is expected to be recognized over the remaining weighted-average period shown above on a straight-line basis except for the Performance-Based Stock Awards which uses the graded-vesting method. Shares forfeited are returned as treasury shares and available for future issuances. During the nine months ended September 30, 2021 and 2020, our employees surrendered approximately 43 thousand and 25 thousand shares of our common stock, respectively, to satisfy tax withholding obligations arising in connection with the vesting of common stock awards issued under our 2014 Omnibus Incentive Plan. We recognized windfall tax benefits of $3.0 million for the nine months ended September 30, 2021 and we recognized a tax shortfall of $0.3 million for the nine months ended September 30, 2020 within the income tax provision in the Condensed Consolidated Statements of Operations and Comprehensive Income. As of September 30, 2021, approximately 1.9 million of the 3.0 million shares of common stock authorized for issuance were available for issuance under the 2014 Omnibus Incentive Plan.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	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, 2021, our effective tax rate was 26.1% and 23.5%, respectively. The rate for the nine months ended September 30, 2021 was favorably impacted by recognition of a windfall tax benefit from the vesting of share-based compensation. During the three and nine months ended September 30, 2020, our effective tax rate was 25.8% and 26.2%, respectively. The rate for the nine months ended September 30, 2020 was unfavorably impacted by recognition of a shortfall tax expense from the vesting of share-based compensation.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2021
Related Party Transactions [Abstract]
Related Party Transactions	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 8, Leases, for future minimum lease payments to be paid to these related parties. The amount of sales to common or related parties as well as the purchases from and rent expense paid to common or related parties were as follows (in thousands): Three months ended September 30, Nine months ended September 30, 2021 2020 2021 2020 Sales $ 260 $ 373 $ 1,081 $ 3,761 Purchases 486 331 1,218 1,457 Rent 370 297 983 867

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Accrued General Liability and Auto Insurance Accrued general liability and auto insurance reserves included on the Condensed Consolidated Balance Sheets were as follows (in thousands): September 30, 2021 December 31, 2020 Included in other current liabilities $ 4,894 $ 5,102 Included in other long-term liabilities 17,845 16,440 $ 22,739 $ 21,542 We also had insurance receivables and indemnification assets included on the Condensed Consolidated Balance Sheets that, in aggregate, offset equal liabilities included within the reserve amounts noted above. The amounts were as follows (in thousands): September 30, 2021 December 31, 2020 Insurance receivables and indemnification assets for claims under fully insured policies $ 3,969 $ 4,400 Insurance receivables for claims that exceeded the stop loss limit 327 328 Total insurance receivables and indemnification assets included in other non-current assets $ 4,296 $ 4,728 Leases See Note 8, Leases, for further information regarding our lease commitments. 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

Business Combinations	9 Months Ended
	Sep. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Business Combinations	BUSINESS COMBINATIONS As part of our ongoing strategy to expand geographically and increase market share in certain markets, we completed seven business combination during the nine months ended September 30, 2021 and five business combinations during the nine months ended September 30, 2020. The largest of these acquisitions were I.W. International Insulation, Inc., dba Intermountain West Insulation (“IWI”) in March 2021, Alert Insulation ("Alert") and Alpine Construction Services ("Alpine") in April 2021, General Ceiling & Partitions, Inc. ("GCP") in June 2021, Five Star Building Products, LLC and Five Star Building Products of Southern Utah, LLC (collectively "Five Star") in September 2021, Royals Commercial Services, Inc. (“Royals”) in February 2020, and Energy One America ("Energy One") and Storm Master Gutters ("Storm Master") in August 2020. Below is a summary of each significant acquisition by year, including revenue and net income (loss) since date of acquisition, shown for the year of acquisition. Where noted, “Other” represents acquisitions that were individually immaterial in that year. Net income (loss) includes amortization, taxes and interest allocations when appropriate. For the three and nine months ended September 30, 2021 (in thousands): Three months ended September 30, 2021 Nine months ended September 30, 2021 2021 Acquisitions Date Acquisition Cash Paid Seller Total Revenue Net Income (Loss) Revenue Net Income IWI 03/01/2021 Share $ 42,098 $ 5,959 $ 48,057 $ 10,556 $ 590 $ 24,315 $ 2,068 Alert 4/13/2021 Asset 5,850 2,980 8,830 4,764 2 8,890 147 Alpine 4/19/2021 Asset 7,945 2,208 10,153 3,045 263 4,996 216 GCP 6/7/2021 Asset 9,700 1,427 11,127 2,624 (152) 3,270 (118) Five Star 9/13/2021 Share 26,308 5,466 31,774 1,243 25 1,243 25 Other Various Asset 4,240 947 5,187 956 (29) 1,252 (43) $ 96,141 $ 18,987 $ 115,128 $ 23,188 $ 699 $ 43,966 $ 2,295 For the three and nine months ended September 30, 2020 (in thousands): Three months ended September 30, 2020 Nine months ended September 30, 2020 2020 Acquisitions Date Acquisition Cash Paid Seller Total Revenue Net Income Revenue Net Income Royals 02/29/2020 Asset $ 7,590 $ 2,500 $ 10,090 $ 2,843 $ 279 $ 6,650 $ 628 Energy One 8/10/2020 Asset 13,200 1,595 14,795 2,853 (202) 2,853 (202) Storm Master 8/31/2020 Asset 13,000 1,336 14,336 2,055 85 2,055 85 Other Various Asset 5,035 1,538 6,573 1,879 (252) 2,643 (291) $ 38,825 $ 6,969 $ 45,794 $ 9,630 $ (90) $ 14,201 $ 220 Acquisition-related costs recorded within administrative expenses on the Condensed Consolidated Statements of Operations and Comprehensive Income amounted to $(0.3) million and $1.6 million for the three and nine months ended September 30, 2021, respectively, and $0.8 million and $2.0 million for the three and nine months ended September 30, 2020, respectively. The goodwill recognized in conjunction with these business combinations represents the excess cost of the acquired entity over the net amount assigned to assets acquired and liabilities assumed. We expect to deduct approximately $15.0 million of goodwill for tax purposes as a result of 2021 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 (in thousands): As of September 30, 2021 IWI Alert Alpine GCP Five Star Other Total Estimated fair values: Cash $ 168 $ — $ — $ — $ 1,472 $ — $ 1,640 Accounts receivable 5,122 4,710 — 3,067 4,597 446 17,942 Inventories 1,157 765 359 — 1,399 138 3,818 Other current assets 2,354 738 — — 330 — 3,422 Property and equipment 796 693 726 206 1,161 544 4,126 Intangibles 25,200 2,770 5,543 5,670 17,400 2,787 59,370 Goodwill 25,212 940 3,582 2,695 6,482 1,295 40,206 Other non-current assets 264 132 — — — — 396 Accounts payable and other current liabilities (3,349) (1,184) (57) (493) (1,040) (20) (6,143) Deferred income tax liabilities (6,537) — — — — — (6,537) Other long-term liabilities (2,330) (734) — (18) (27) (3) (3,112) Fair value of assets acquired and purchase price 48,057 8,830 10,153 11,127 31,774 5,187 115,128 Less seller obligations 5,959 2,980 2,208 1,427 5,466 947 18,987 Cash paid $ 42,098 $ 5,850 $ 7,945 $ 9,700 $ 26,308 $ 4,240 $ 96,141 As of September 30, 2020 Royals Energy One Storm Master Other Total Estimated fair values: Accounts receivable 2,848 3,350 2,362 1,418 $ 9,978 Inventories 305 812 175 278 $ 1,570 Other current assets 430 12 — 145 $ 587 Property and equipment 598 2,319 798 350 $ 4,065 Intangibles 3,930 6,500 8,720 2,996 $ 22,146 Goodwill 3,015 3,304 3,631 1,697 $ 11,647 Other non-current assets 58 — — 16 $ 74 Accounts payable and other current liabilities (1,059) (1,483) (1,336) (196) $ (4,074) Other long-term liabilities (35) (19) (14) (131) $ (199) Fair value of assets acquired and purchase price 10,090 14,795 14,336 6,573 45,794 Less seller obligations 2,500 1,595 1,336 1,538 6,969 Cash paid $ 7,590 $ 13,200 $ 13,000 $ 5,035 $ 38,825 Contingent consideration is included as “seller obligations” in the above table or within “fair value of assets acquired” if subsequently paid during the period presented. These contingent payments consist primarily of earnouts based on performance that are recorded at fair value at the time of acquisition, and/or non-compete agreements and amounts based on working capital calculations. When these payments are expected to be made over one year from the acquisition date, the contingent consideration is discounted to net present value of future payments based on a weighted average of various future forecast scenarios. Further adjustments to the allocation for each acquisition still under its measurement period are expected as third-party or internal valuations are finalized, certain tax aspects of the transaction are completed, contingent consideration is settled 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 may not agree to the total gross increases of these assets as shown in Note 6, Goodwill and Intangibles, during each of the nine months ended September 30, 2021 and 2020 due to adjustments to goodwill for the allocation of certain acquisitions still under measurement as well as other immaterial intangible assets added during the ordinary course of business. Estimates of acquired intangible assets related to the acquisitions are as follows (in thousands): For the nine months ended September 30, 2021 2020 Acquired intangibles assets Estimated Weighted Estimated Weighted Customer relationships $ 43,115 12 $ 14,528 8 Trademarks and tradenames 10,147 15 3,796 15 Non-competition agreements 4,530 5 1,946 5 Backlog 1,578 1.5 1,876 1.5 Pro Forma Information The unaudited pro forma information for the combined results of the Company has been prepared as if the 2021 acquisitions had taken place on January 1, 2020 and the 2020 acquisitions had taken place on January 1, 2019. 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, 2020 and 2019, respectively, and the unaudited pro forma information does not purport to be indicative of future financial operating results (in thousands, except per share data): Unaudited pro forma for the three months ended September 30, Unaudited pro forma for the nine months ended September 30, 2021 2020 2021 2020 Net revenue $ 516,057 $ 465,639 $ 1,474,979 $ 1,356,619 Net income 35,574 30,876 93,262 77,604 Basic net income per share 1.21 1.05 3.18 2.63 Diluted net income per share 1.20 1.04 3.15 2.61 Unaudited pro forma net income reflects additional intangible asset amortization expense of $0.3 million and $2.2 million for the three and nine months ended September 30, 2021, respectively, and $2.9 million and $9.7 million for the three and nine months ended September 30, 2020, respectively, as well as additional income tax expense of $0.2 million and $1.2 million for the three and nine months ended September 30, 2021, respectively, and $1.0 million and $2.9 million for the three and nine months ended September 30, 2020, respectively, that would have been recorded had the 2021 acquisitions taken place on January 1, 2020 and the 2020 acquisitions taken place on January 1, 2019.

Income Per Common Share

Income Per Common Share	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Income Per Common Share	INCOME PER COMMON SHARE Basic net income per common 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 common 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 common share calculation when dilutive. The dilutive effect of outstanding restricted stock awards after application of the treasury stock method was 216 thousand and 260 thousand shares for the three and nine months ended September 30, 2021, respectively, and 219 thousand and 188 thousand shares for the three and nine months ended

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2021
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS On November 1, 2021, we acquired substantially all of the assets of Denison Glass and Mirror, Inc., for total consideration of approximately $13.7 million. The initial accounting for the business combinations was not complete at the time the financial statements were issued due to the timing of the acquisitions 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. In anticipation of future debt refinancing, on October 27, 2021, we entered into two new forward interest rate swap derivatives. These forward interest rate swaps will begin on December 31, 2021. Each swap has a fixed notional amount of $100.0 million, a fixed rate of 1.37%, and a maturity date of December 15, 2028. On November 4, 2021, we announced that our board of directors declared a quarterly dividend, payable on December 31, 2021 to stockholders of record on December 15, 2021, at a rate of $0.30 per share.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Consolidation	The accompanying consolidated financial statements include all of our wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated.
Basis of Presentation	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 omitted pursuant to such rules and regulations.
Recently Adopted Accounting Pronouncements	Standard Effective Date Adoption ASU 2021-01, Reference Rate Reform (Topic 848):Scope Effective upon issuance This pronouncement clarifies the scope and application of ASU 2020-04, "Reference Rate Reform: Facilitation of the Effects of Reference Rate Reform on Financial Reporting (Topic 848)." We continue to evaluate the impact of Topic 848 and may apply other elections as applicable as additional changes in the market occur. ASU 2019-12, Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes January 1, 2021 This pronouncement simplifies the accounting for income taxes by removing certain exceptions to the general principles of Topic 740 and improves the consistent application of GAAP by clarifying and amending existing guidance. The adoption of this standard did not impact our financial statements or have a material effect on our disclosures.
Revenue from Contract with Customer	Our revenues are derived primarily through contracts with customers whereby we install insulation and other complementary building products and are recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. We account for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. An insignificant portion of our sales, primarily retail sales, is accounted for on a point-in-time basis when the sale occurs, adjusted accordingly for any return provisions. We do offer assurance-type warranties on certain of our installed products and services that do not represent a separate performance obligation and, as such, do not impact the timing or extent of revenue recognition. For contracts that are not complete at the reporting date, we recognize revenue over time utilizing a cost-to-cost input method as we believe this represents the best measure of when goods and services are transferred to the customer. When this method is used, we estimate the costs to complete individual contracts and record as revenue that portion of the total contract price that is considered complete based on the relationship of costs incurred to date to total anticipated costs. Under the cost-to-cost method, the use of estimated costs to complete each contract is a significant variable in the process of determining recognized revenue, requires judgment and can change throughout the duration of a contract due to contract modifications and other factors impacting job completion. 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. Our long-term contracts can be subject to modification to account for changes in contract specifications and requirements. We consider contract modifications to exist when the modification either creates new, or changes the existing, enforceable rights and obligations. Most of our contract modifications are for goods or services that are not distinct from the existing contract due to the significant integration service provided in the context of the contract and are accounted for as if they were part of that existing contract. The effect of a contract modification on the transaction price and our measure of progress for the performance obligation to which it relates, is recognized as an adjustment to revenue (either as an increase in or a reduction of revenue) on a cumulative catch-up basis. Payment terms typically do not exceed 30 days for short-term contracts and typically do not exceed 60 days for long-term contracts with customers. All contracts are billed either contractually or as work is performed. Billing on our long-term contracts occurs primarily on a monthly basis throughout the contract period whereby we submit invoices for customer payment based on actual or estimated costs incurred during the billing period. On certain of our long-term contracts the customer may withhold payment on an invoice equal to a percentage of the invoice amount, which will be subsequently paid after satisfactory completion of each installation project. This amount is referred to as retainage and is common practice in the construction industry, as it allows for customers to ensure the quality of the service performed prior to full payment. Retainage receivables are classified as current or long-term assets based on the expected time to project completion.
Fair Value Measurements	In many cases, a valuation technique used to measure fair value includes inputs from multiple levels of the fair value hierarchy. The lowest level of significant input determines the placement of the entire fair value measurement in the hierarchy. During the periods presented, there were no transfers between fair value hierarchical levels. Assets Measured at Fair Value on a Nonrecurring Basis Certain assets, specifically other intangible and long-lived assets, are measured at fair value on a nonrecurring basis in periods subsequent to initial recognition. Assets measured at fair value on a nonrecurring basis as of September 30, 2021 and December 31, 2020 are categorized based on the lowest level of significant input to the valuation. The assets are measured at fair value when our impairment assessment indicates a carrying value for each of the assets in excess of the asset’s estimated fair value. Undiscounted cash flows, a Level 3 input, are utilized in determining estimated fair values. During each of the three and nine months ended September 30, 2021 and 2020, we did not record any impairments on these assets required to be measured at fair value on a nonrecurring basis. Estimated Fair Value of Financial Instruments Accounts receivable, accounts payable and accrued liabilities as of September 30, 2021 and December 31, 2020 approximate fair value due to the short-term maturities of these financial instruments. The carrying amounts of certain long-term debt, including the Term Loan and ABL Revolver as of September 30, 2021 and December 31, 2020, approximate fair value due to the variable rate nature of the agreements. The carrying amounts of our operating lease right-of-use assets and the obligations associated with our operating and finance leases as well as our vehicle and equipment notes approximate fair value as of September 30, 2021 and December 31, 2020. All debt classifications represent Level 2 fair value measurements. Derivative financial instruments are measured at fair value based on observable market information and appropriate valuation methods. Contingent consideration liabilities arise from future earnout payments to the sellers associated with certain acquisitions and are based on predetermined calculations of certain future results. These future payments are estimated by

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Recently Adopted Accounting Pronouncements	Standard Effective Date Adoption ASU 2021-01, Reference Rate Reform (Topic 848):Scope Effective upon issuance This pronouncement clarifies the scope and application of ASU 2020-04, "Reference Rate Reform: Facilitation of the Effects of Reference Rate Reform on Financial Reporting (Topic 848)." We continue to evaluate the impact of Topic 848 and may apply other elections as applicable as additional changes in the market occur. ASU 2019-12, Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes January 1, 2021 This pronouncement simplifies the accounting for income taxes by removing certain exceptions to the general principles of Topic 740 and improves the consistent application of GAAP by clarifying and amending existing guidance. The adoption of this standard did not impact our financial statements or have a material effect on our disclosures.

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Summary of Revenues Disaggregated by End Market and Product	Three months ended September 30, Nine months ended September 30, 2021 2020 2021 2020 Residential new construction $ 386,346 76 % $ 315,434 75 % $ 1,091,414 76 % $ 912,095 75 % Repair and remodel 34,506 7 % 28,625 7 % 94,142 7 % 75,702 6 % Commercial 88,911 17 % 76,427 18 % 249,371 17 % 223,959 19 % Net revenue $ 509,763 100 % $ 420,486 100 % $ 1,434,927 100 % $ 1,211,756 100 % Three months ended September 30, Nine months ended September 30, 2021 2020 2021 2020 Insulation $ 324,360 64 % $ 268,292 64 % $ 921,181 64 % $ 779,045 64 % Waterproofing 34,514 7 % 33,272 8 % 98,727 7 % 89,855 7 % Shower doors, shelving and mirrors 35,411 7 % 29,282 7 % 101,830 7 % 85,199 7 % Garage doors 26,951 5 % 24,001 6 % 77,434 5 % 68,655 6 % Rain gutters 21,807 4 % 17,295 4 % 62,270 4 % 41,942 4 % Fireproofing/firestopping (1) 17,684 3 % 11,047 2 % 43,156 3 % 36,325 3 % Window blinds 13,197 3 % 12,166 3 % 37,398 3 % 34,651 3 % Other building products 35,839 7 % 25,131 6 % 92,931 7 % 76,084 6 % Net revenue $ 509,763 100 % $ 420,486 100 % $ 1,434,927 100 % $ 1,211,756 100 % (1) Combined with "Other building products" in previous years.
Summary of Assets and Liabilities Related to Uncompleted Contracts and Customer Deposits	Contract assets and liabilities related to our uncompleted contracts and customer deposits were as follows (in thousands): September 30, 2021 December 31, 2020 Contract assets $ 32,265 $ 24,334 Contract liabilities (10,611) (8,965)
Schedule of Cost and Estimated Earnings on Uncompleted Contracts	Uncompleted contracts were as follows (in thousands): September 30, 2021 December 31, 2020 Costs incurred on uncompleted contracts $ 216,929 $ 169,544 Estimated earnings 112,854 90,737 Total 329,783 260,281 Less: Billings to date 301,626 240,665 Net under billings $ 28,157 $ 19,616
Schedule of Net Under Billings	Net under billings were as follows (in thousands): September 30, 2021 December 31, 2020 Costs and estimated earnings in excess of billings on uncompleted contracts (contract assets) $ 32,265 $ 24,334 Billings in excess of costs and estimated earnings on uncompleted contracts (contract liabilities) (4,108) (4,718) Net under billings $ 28,157 $ 19,616

Credit Losses (Tables)

Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2021
Credit Loss [Abstract]
Schedule Of Changes In Allowance For Credit Losses	Changes in our allowance for credit losses were as follows (in thousands): Balance as of January 1, 2021 $ 8,789 Current period provision 1,135 Recoveries collected and additions 506 Amounts written off (1,646) Balance as of September 30, 2021 $ 8,784

Goodwill and Intangibles (Table

Goodwill and Intangibles (Tables)	9 Months Ended
	Sep. 30, 2021
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 Accumulated Goodwill January 1, 2021 $ 286,874 $ (70,004) $ 216,870 Business Combinations 40,206 — 40,206 Other 30 — 30 September 30, 2021 $ 327,110 $ (70,004) $ 257,106
Schedule of Gross Carrying Amount, Accumulated Amortization and Net Book Value	The following table provides the gross carrying amount, accumulated amortization and net book value for each major class of intangibles (in thousands): As of September 30, As of December 31, 2021 2020 Gross Accumulated Net Gross Accumulated Net Amortized intangibles: Customer relationships $ 240,756 $ 106,997 $ 133,759 $ 197,641 $ 89,137 $ 108,504 Covenants not-to-compete 24,973 15,628 9,345 20,309 13,436 6,873 Trademarks and tradenames 89,804 31,164 58,640 79,657 27,245 52,412 Backlog 20,425 18,069 2,356 18,847 15,243 3,604 $ 375,958 $ 171,858 $ 204,100 $ 316,454 $ 145,061 $ 171,393
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 2021 $ 9,509 2022 34,971 2023 30,650 2024 27,136 2025 21,731 Thereafter 80,103

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Schedule of Debt	Long-term debt consisted of the following (in thousands): As of September 30, As of December 31, 2021 2020 Senior Notes due 2028, net of unamortized debt issuance costs of $3,783 and $4,230, respectively $ 296,217 $ 295,770 Term Loan, net of unamortized debt issuance costs of $1,094 and $1,343, respectively 198,906 198,657 Vehicle and equipment notes, maturing through September 2026; payable in various monthly installments, including interest rates ranging from 1.9% to 4.8% 68,759 67,493 Various notes payable, maturing through March 2025; payable in various monthly installments, including interest rates ranging from 2.0% to 5.0% 3,192 3,392 567,074 565,312 Less: current maturities (24,557) (23,355) Long-term debt, less current maturities $ 542,517 $ 541,957
Schedule of Maturities of Long-term Debt	Remaining required repayments of debt principal, gross of unamortized debt issuance costs, as of September 30, 2021 are as follows (in thousands): Remainder of 2021 $ 6,425 2022 23,548 2023 18,477 2024 12,684 2025 209,147 Thereafter 301,670

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Schedule of Lease-Related Assets and Liabilities	The table below presents the lease-related assets and liabilities recorded on the Condensed Consolidated Balance Sheets: As of September 30, As of December 31, (in thousands) Classification 2021 2020 Assets Non-Current Operating Operating lease right-of-use assets $ 61,028 $ 53,766 Finance Property and equipment, net 5,019 4,946 Total lease assets $ 66,047 $ 58,712 Liabilities Current Operating Current maturities of operating lease obligations $ 21,278 $ 18,758 Financing Current maturities of finance lease obligations 1,780 2,073 Non-Current Operating Operating lease obligations 39,155 34,413 Financing Finance lease obligations 3,038 2,430 Total lease liabilities $ 65,251 $ 57,674 Weighted-average remaining lease term: Operating leases 3.9 years 4.1 years Finance leases 3.2 years 2.6 years Weighted-average discount rate: Operating leases 3.37 % 3.67 % Finance leases 4.95 % 5.08 % +
Schedule of Lease Costs for Finance and Operating Leases	The table below presents certain information related to the lease costs for finance and operating leases: Three months ended September 30, Nine months ended September 30, (in thousands) Classification 2021 2020 2021 2020 Operating lease cost (1) Administrative $ 6,927 $ 5,760 $ 19,947 $ 16,972 Finance lease cost Amortization of leased assets (2) Cost of sales 769 856 2,342 2,762 Interest on finance lease obligations Interest expense, net 54 64 161 207 Total lease costs $ 7,750 $ 6,680 $ 22,450 $ 19,941 (1) Includes variable lease costs of $0.7 million and $0.6 million for the three months ended September 30, 2021 and 2020, respectively, and $2.2 million and $1.9 million for the nine months ended September 30, 2021 and 2020, respectively, and short-term lease costs of $0.3 million and $0.2 million for the three months ended September 30, 2021 and 2020, respectively, and $0.8 million and $0.6 million for the nine months ended September 30, 2021 and 2020, respectively. (2) Includes variable lease costs of $0.2 million for each of the three months ended September 30, 2021 and 2020, and $0.5 million and $0.6 million for each of the nine months ended September 30, 2021 and 2020. The table below presents supplemental cash flow information related to leases (in thousands): Three months ended September 30, Nine months ended September 30, 2021 2020 2021 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases $ 5,821 $ 4,949 $ 16,763 $ 14,501 Operating cash flows for finance leases 54 64 161 207 Financing cash flows for finance leases 532 606 1,573 1,998
Schedule of Undiscounted Cash Flows Finance Lease Obligations	The table below reconciles the undiscounted cash flows for each of the first five years and total of the remaining years for the finance lease obligations and operating lease obligations recorded on the Condensed Consolidated Balance Sheet as of September 30, 2021 (in thousands): Finance Leases Operating Leases Related Party Other Total Operating Remainder of 2021 $ 661 $ 342 $ 5,696 $ 6,038 2022 1,751 1,347 20,432 21,779 2023 1,278 906 14,878 15,784 2024 869 645 8,112 8,757 2025 501 519 4,481 5,000 Thereafter 200 — 7,496 7,496 Total minimum lease payments 5,260 $ 3,759 $ 61,095 64,854 Less: Amounts representing executory costs (36) Less: Amounts representing interest (406) (4,421) Present value of future minimum lease payments 4,818 60,433 Less: Current obligation under leases (1,780) (21,278) Long-term lease obligations $ 3,038 $ 39,155
Schedule of Undiscounted Cash Flows Operating Lease Obligations	The table below reconciles the undiscounted cash flows for each of the first five years and total of the remaining years for the finance lease obligations and operating lease obligations recorded on the Condensed Consolidated Balance Sheet as of September 30, 2021 (in thousands): Finance Leases Operating Leases Related Party Other Total Operating Remainder of 2021 $ 661 $ 342 $ 5,696 $ 6,038 2022 1,751 1,347 20,432 21,779 2023 1,278 906 14,878 15,784 2024 869 645 8,112 8,757 2025 501 519 4,481 5,000 Thereafter 200 — 7,496 7,496 Total minimum lease payments 5,260 $ 3,759 $ 61,095 64,854 Less: Amounts representing executory costs (36) Less: Amounts representing interest (406) (4,421) Present value of future minimum lease payments 4,818 60,433 Less: Current obligation under leases (1,780) (21,278) Long-term lease obligations $ 3,038 $ 39,155

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Schedule of Fair Values of Financial Assets and Liabilities	The fair values of financial assets and liabilities that are recorded at fair value in the Condensed Consolidated Balance Sheets and not described above were as follows (in thousands): As of September 30, 2021 As of December 31, 2020 Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Financial assets: Cash equivalents $ 166,473 $ 166,473 $ — $ — $ 170,398 $ 170,398 $ — $ — Derivative financial instruments 13,567 — 13,567 — 5,130 — 5,130 — Total financial assets $ 180,040 $ 166,473 $ 13,567 $ — $ 175,528 $ 170,398 $ 5,130 $ — Financial liabilities: Contingent consideration $ 8,591 $ — $ — $ 8,591 $ 4,004 $ — $ — $ 4,004 Derivative financial instruments 774 — 774 — 324 — 324 — Total financial liabilities $ 9,365 $ — $ 774 $ 8,591 $ 4,328 $ — $ 324 $ 4,004
Summary of Change in Fair Value of Contingent Consideration	The change in fair value of the contingent consideration (a Level 3 input) was as follows (in thousands): Contingent consideration liability - January 1, 2021 $ 4,004 Preliminary purchase price 6,000 Fair value adjustments (296) Accretion in value 845 Amounts cancelled (1,036) Amounts paid to sellers (926) Contingent consideration liability - September 30, 2021 $ 8,591
Summary of Carrying Values and Associated Fair Values of Financial Assets and Liabilities	To estimate the fair value of our Senior Notes, we utilized third-party quotes which are derived all or in part from model prices, external sources or market prices. The Senior Notes represents a Level 2 fair value measurement and is as follows (in thousands): As of September 30, 2021 As of December 31, 2020 Carrying Value Fair Value Carrying Value Fair Value Senior Notes (1) $ 300,000 $ 316,197 $ 300,000 $ 320,013 (1) Excludes the impact of unamortized debt issuance costs.

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Dividends Declared and Paid	During the nine months ended September 30, 2021, we declared and paid the following cash dividends (amount declared and amount paid in thousands): Declaration Date Record Date Payment Date Dividend Per Share Amount Declared Amount Paid 2/23/2021 3/15/2021 3/31/2021 $ 0.30 $ 8,907 $ 8,786 5/5/2021 6/15/2021 6/30/2021 $ 0.30 $ 8,910 $ 8,821 8/5/2021 9/15/2021 9/30/2021 $ 0.30 $ 8,912 $ 8,821

Employee Benefits (Tables)

Employee Benefits (Tables)	9 Months Ended
	Sep. 30, 2021
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, 2021 December 31, 2020 Included in other current liabilities $ 6,775 $ 7,703 Included in other long-term liabilities 12,490 11,986 $ 19,265 $ 19,689
Schedule of Insurance Receivable for Claims	This receivable offsets an equal liability included within the reserve amounts noted above and was as follows (in thousands): September 30, 2021 December 31, 2020 Included in other non-current assets $ 2,082 $ 1,854
Summary of Equity-based Awards for Employees	Amounts and changes for each category of equity-based award were as follows: Common Stock Awards Performance-Based Stock Awards Performance-Based Restricted Stock Awards Weighted Awards Weighted Units Weighted Nonvested awards/units at December 31, 2020 231,280 $ 48.05 166,961 $ 59.97 13,273 $ 36.51 Granted 55,815 124.88 42,449 123.32 8,470 126.89 Vested (84,254) 48.81 (64,525) 52.79 (12,952) 36.51 Forfeited/Cancelled (2,448) 57.85 — — (488) 67.44 Nonvested awards/units at September 30, 2021 200,393 $ 69.01 144,885 $ 81.73 8,303 $ 126.89
Summary of Stock Compensation Expenses	The following table summarizes the share-based compensation expense recognized under our 2014 Omnibus Incentive Plan (in thousands): Three months ended September 30, Nine months ended September 30, 2021 2020 2021 2020 Common Stock Awards $ 1,426 $ 997 $ 3,843 $ 3,006 Non-Employee Common Stock Awards 126 104 339 230 Performance-Based Stock Awards 1,128 928 3,462 2,844 Liability Performance-Based Stock Awards 598 488 1,983 1,554 Performance-Based Restricted Stock Units 257 118 601 416 $ 3,535 $ 2,635 $ 10,228 $ 8,050 We recorded the following stock compensation expense by income statement category (in thousands): Three months ended September 30, Nine months ended September 30, 2021 2020 2021 2020 Cost of sales $ 161 $ 60 $ 287 $ 221 Selling 56 45 145 154 Administrative 3,318 2,530 9,796 7,675 $ 3,535 $ 2,635 $ 10,228 $ 8,050
Unrecognized Share-Based Compensation Expense Related to Unvested Awards	Unrecognized share-based compensation expense related to unvested awards was as follows (in thousands): As of September 30, 2021 Unrecognized Weighted Average Common Stock Awards $ 9,201 1.8 years Performance-Based Stock Awards 6,082 1.7 years Performance-Based Restricted Stock Units 553 0.5 years Total unrecognized compensation expense related to unvested awards $ 15,836

Related Party Transactions (Tab

Related Party Transactions (Tables)	9 Months Ended
	Sep. 30, 2021
Related Party Transactions [Abstract]
Schedule of Common or Related Party Transactions	The amount of sales to common or related parties as well as the purchases from and rent expense paid to common or related parties were as follows (in thousands): Three months ended September 30, Nine months ended September 30, 2021 2020 2021 2020 Sales $ 260 $ 373 $ 1,081 $ 3,761 Purchases 486 331 1,218 1,457 Rent 370 297 983 867

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Schedule of Accrued General Insurance Reserves	Accrued general liability and auto insurance reserves included on the Condensed Consolidated Balance Sheets were as follows (in thousands): September 30, 2021 December 31, 2020 Included in other current liabilities $ 4,894 $ 5,102 Included in other long-term liabilities 17,845 16,440 $ 22,739 $ 21,542
Schedule of Insurance Receivable for Claims	We also had insurance receivables and indemnification assets included on the Condensed Consolidated Balance Sheets that, in aggregate, offset equal liabilities included within the reserve amounts noted above. The amounts were as follows (in thousands): September 30, 2021 December 31, 2020 Insurance receivables and indemnification assets for claims under fully insured policies $ 3,969 $ 4,400 Insurance receivables for claims that exceeded the stop loss limit 327 328 Total insurance receivables and indemnification assets included in other non-current assets $ 4,296 $ 4,728

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Sep. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Schedule of Business Combinations	For the three and nine months ended September 30, 2021 (in thousands): Three months ended September 30, 2021 Nine months ended September 30, 2021 2021 Acquisitions Date Acquisition Cash Paid Seller Total Revenue Net Income (Loss) Revenue Net Income IWI 03/01/2021 Share $ 42,098 $ 5,959 $ 48,057 $ 10,556 $ 590 $ 24,315 $ 2,068 Alert 4/13/2021 Asset 5,850 2,980 8,830 4,764 2 8,890 147 Alpine 4/19/2021 Asset 7,945 2,208 10,153 3,045 263 4,996 216 GCP 6/7/2021 Asset 9,700 1,427 11,127 2,624 (152) 3,270 (118) Five Star 9/13/2021 Share 26,308 5,466 31,774 1,243 25 1,243 25 Other Various Asset 4,240 947 5,187 956 (29) 1,252 (43) $ 96,141 $ 18,987 $ 115,128 $ 23,188 $ 699 $ 43,966 $ 2,295 For the three and nine months ended September 30, 2020 (in thousands): Three months ended September 30, 2020 Nine months ended September 30, 2020 2020 Acquisitions Date Acquisition Cash Paid Seller Total Revenue Net Income Revenue Net Income Royals 02/29/2020 Asset $ 7,590 $ 2,500 $ 10,090 $ 2,843 $ 279 $ 6,650 $ 628 Energy One 8/10/2020 Asset 13,200 1,595 14,795 2,853 (202) 2,853 (202) Storm Master 8/31/2020 Asset 13,000 1,336 14,336 2,055 85 2,055 85 Other Various Asset 5,035 1,538 6,573 1,879 (252) 2,643 (291) $ 38,825 $ 6,969 $ 45,794 $ 9,630 $ (90) $ 14,201 $ 220
Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed	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 (in thousands): As of September 30, 2021 IWI Alert Alpine GCP Five Star Other Total Estimated fair values: Cash $ 168 $ — $ — $ — $ 1,472 $ — $ 1,640 Accounts receivable 5,122 4,710 — 3,067 4,597 446 17,942 Inventories 1,157 765 359 — 1,399 138 3,818 Other current assets 2,354 738 — — 330 — 3,422 Property and equipment 796 693 726 206 1,161 544 4,126 Intangibles 25,200 2,770 5,543 5,670 17,400 2,787 59,370 Goodwill 25,212 940 3,582 2,695 6,482 1,295 40,206 Other non-current assets 264 132 — — — — 396 Accounts payable and other current liabilities (3,349) (1,184) (57) (493) (1,040) (20) (6,143) Deferred income tax liabilities (6,537) — — — — — (6,537) Other long-term liabilities (2,330) (734) — (18) (27) (3) (3,112) Fair value of assets acquired and purchase price 48,057 8,830 10,153 11,127 31,774 5,187 115,128 Less seller obligations 5,959 2,980 2,208 1,427 5,466 947 18,987 Cash paid $ 42,098 $ 5,850 $ 7,945 $ 9,700 $ 26,308 $ 4,240 $ 96,141 As of September 30, 2020 Royals Energy One Storm Master Other Total Estimated fair values: Accounts receivable 2,848 3,350 2,362 1,418 $ 9,978 Inventories 305 812 175 278 $ 1,570 Other current assets 430 12 — 145 $ 587 Property and equipment 598 2,319 798 350 $ 4,065 Intangibles 3,930 6,500 8,720 2,996 $ 22,146 Goodwill 3,015 3,304 3,631 1,697 $ 11,647 Other non-current assets 58 — — 16 $ 74 Accounts payable and other current liabilities (1,059) (1,483) (1,336) (196) $ (4,074) Other long-term liabilities (35) (19) (14) (131) $ (199) Fair value of assets acquired and purchase price 10,090 14,795 14,336 6,573 45,794 Less seller obligations 2,500 1,595 1,336 1,538 6,969 Cash paid $ 7,590 $ 13,200 $ 13,000 $ 5,035 $ 38,825
Estimates of Acquired Intangible Assets	Estimates of acquired intangible assets related to the acquisitions are as follows (in thousands): For the nine months ended September 30, 2021 2020 Acquired intangibles assets Estimated Weighted Estimated Weighted Customer relationships $ 43,115 12 $ 14,528 8 Trademarks and tradenames 10,147 15 3,796 15 Non-competition agreements 4,530 5 1,946 5 Backlog 1,578 1.5 1,876 1.5
Pro Forma Results of Operations	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, 2020 and 2019, respectively, and the unaudited pro forma information does not purport to be indicative of future financial operating results (in thousands, except per share data): Unaudited pro forma for the three months ended September 30, Unaudited pro forma for the nine months ended September 30, 2021 2020 2021 2020 Net revenue $ 516,057 $ 465,639 $ 1,474,979 $ 1,356,619 Net income 35,574 30,876 93,262 77,604 Basic net income per share 1.21 1.05 3.18 2.63 Diluted net income per share 1.20 1.04 3.15 2.61

Organization - Additional Infor

Organization - Additional Information (Details)	9 Months Ended
	Sep. 30, 2021segmentlocation
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of locations the company operates | location	190
Number of operating segment	1
Number of reportable segment	1

Revenue Recognition - Additiona

Revenue Recognition - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Contract liability revenue recognized	$ 100,000		$ 8,600,000
Impairment losses on contract assets	0	$ 0	0	$ 0
Transaction price allocated to uncompleted contracts	$ 94,900,000		$ 94,900,000
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Payment terms (in days)			30 days
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Payment terms (in days)			60 days
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Expected time of revenue recognition (in months)			18 months

Revenue Recognition - Summary o

Revenue Recognition - Summary of Revenues Disaggregated by End Market and Product (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Net revenue	$ 509,763	$ 420,486	$ 1,434,927	$ 1,211,756
Revenue from Contract with Customer Benchmark | Customer Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk (percent)	100.00%	100.00%	100.00%	100.00%
Revenue from Contract with Customer, Product and Service Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk (percent)	100.00%	100.00%	100.00%	100.00%
Insulation
Disaggregation of Revenue [Line Items]
Net revenue	$ 324,360	$ 268,292	$ 921,181	$ 779,045
Insulation | Revenue from Contract with Customer, Product and Service Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk (percent)	64.00%	64.00%	64.00%	64.00%
Waterproofing
Disaggregation of Revenue [Line Items]
Net revenue	$ 34,514	$ 33,272	$ 98,727	$ 89,855
Waterproofing | Revenue from Contract with Customer, Product and Service Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk (percent)	7.00%	8.00%	7.00%	7.00%
Shower doors, shelving and mirrors
Disaggregation of Revenue [Line Items]
Net revenue	$ 35,411	$ 29,282	$ 101,830	$ 85,199
Shower doors, shelving and mirrors | Revenue from Contract with Customer, Product and Service Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk (percent)	7.00%	7.00%	7.00%	7.00%
Garage doors
Disaggregation of Revenue [Line Items]
Net revenue	$ 26,951	$ 24,001	$ 77,434	$ 68,655
Garage doors | Revenue from Contract with Customer, Product and Service Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk (percent)	5.00%	6.00%	5.00%	6.00%
Rain gutters
Disaggregation of Revenue [Line Items]
Net revenue	$ 21,807	$ 17,295	$ 62,270	$ 41,942
Rain gutters | Revenue from Contract with Customer, Product and Service Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk (percent)	4.00%	4.00%	4.00%	4.00%
Fireproofing/firestopping
Disaggregation of Revenue [Line Items]
Net revenue	$ 17,684	$ 11,047	$ 43,156	$ 36,325
Fireproofing/firestopping | Revenue from Contract with Customer, Product and Service Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk (percent)	3.00%	2.00%	3.00%	3.00%
Window blinds
Disaggregation of Revenue [Line Items]
Net revenue	$ 13,197	$ 12,166	$ 37,398	$ 34,651
Window blinds | Revenue from Contract with Customer, Product and Service Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk (percent)	3.00%	3.00%	3.00%	3.00%
Other building products
Disaggregation of Revenue [Line Items]
Net revenue	$ 35,839	$ 25,131	$ 92,931	$ 76,084
Other building products | Revenue from Contract with Customer, Product and Service Benchmark | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk (percent)	7.00%	6.00%	7.00%	6.00%
Residential new construction
Disaggregation of Revenue [Line Items]
Net revenue	$ 386,346	$ 315,434	$ 1,091,414	$ 912,095
Residential new construction | Revenue from Contract with Customer Benchmark | Customer Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk (percent)	76.00%	75.00%	76.00%	75.00%
Repair and remodel
Disaggregation of Revenue [Line Items]
Net revenue	$ 34,506	$ 28,625	$ 94,142	$ 75,702
Repair and remodel | Revenue from Contract with Customer Benchmark | Customer Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk (percent)	7.00%	7.00%	7.00%	6.00%
Commercial
Disaggregation of Revenue [Line Items]
Net revenue	$ 88,911	$ 76,427	$ 249,371	$ 223,959
Commercial | Revenue from Contract with Customer Benchmark | Customer Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk (percent)	17.00%	18.00%	17.00%	19.00%

Revenue Recognition - Summary_2

Revenue Recognition - Summary of Assets and Liabilities Related to Uncompleted Contracts and Customer Deposits (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Contract assets	$ 32,265	$ 24,334
Contract liabilities	$ (10,611)	$ (8,965)

Revenue Recognition - Schedule

Revenue Recognition - Schedule of Cost and Estimated Earnings on Uncompleted Contracts (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Costs incurred on uncompleted contracts	$ 216,929	$ 169,544
Estimated earnings	112,854	90,737
Total	329,783	260,281
Less: Billings to date	301,626	240,665
Net under billings	$ 28,157	$ 19,616

Revenue Recognition - Schedul_2

Revenue Recognition - Schedule of Net Under (Over) Billings (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Costs and estimated earnings in excess of billings on uncompleted contracts (contract assets)	$ 32,265	$ 24,334
Billings in excess of costs and estimated earnings on uncompleted contracts (contract liabilities)	(4,108)	(4,718)
Net under billings	$ 28,157	$ 19,616

Credit Losses (Details)

Credit Losses (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 8,789
Current period provision	1,135
Recoveries collected and additions	506
Amounts written off	(1,646)
Ending balance	$ 8,784

Cash and Cash Equivalents (Deta

Cash and Cash Equivalents (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	$ 166.5	$ 170.4

Goodwill and Intangibles - Summ

Goodwill and Intangibles - Summary of Change in Carrying Amount of Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)
Goodwill [Roll Forward]
Goodwill (Gross), beginning balance	$ 286,874
Accumulated Impairment Losses, beginning balance	(70,004)
Goodwill (Net), beginning balance	216,870
Business Combinations	40,206
Other	30
Goodwill (Gross), ending balance	327,110
Accumulated Impairment Losses, ending balance	(70,004)
Goodwill (Net), ending balance	$ 257,106

Goodwill and Intangibles - Sche

Goodwill and Intangibles - Schedule of Gross Carrying Amount and Accumulated Amortization (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 375,958	$ 316,454
Accumulated Amortization	171,858	145,061
Net Book Value	204,100	171,393
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	240,756	197,641
Accumulated Amortization	106,997	89,137
Net Book Value	133,759	108,504
Covenants not-to-compete
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	24,973	20,309
Accumulated Amortization	15,628	13,436
Net Book Value	9,345	6,873
Trademarks and tradenames
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	89,804	79,657
Accumulated Amortization	31,164	27,245
Net Book Value	58,640	52,412
Backlog
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	20,425	18,847
Accumulated Amortization	18,069	15,243
Net Book Value	$ 2,356	$ 3,604

Goodwill and Intangibles - Addi

Goodwill and Intangibles - Additional Information (Details) $ in Millions	9 Months Ended
	Sep. 30, 2021USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Increase in gross carrying amount of intangibles	$ 59.5

Goodwill and Intangibles - Sc_2

Goodwill and Intangibles - Schedule of Estimated Aggregate Annual Amortization (Details) $ in Thousands	Sep. 30, 2021USD ($)
Finite Lived Intangible Assets Net Amortization Expense Rolling Maturity [Abstract]
Remainder of 2021	$ 9,509
2022	34,971
2023	30,650
2024	27,136
2025	21,731
Thereafter	$ 80,103

Long-Term Debt - Schedule of De

Long-Term Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2019
Debt Instrument [Line Items]
Total long term debt	$ 567,074	$ 565,312
Less: current maturities	(24,557)	(23,355)
Long-term debt, less current maturities	542,517	541,957
Senior Notes | 5.75% Senior Notes Due 2028
Debt Instrument [Line Items]
Total long term debt	296,217	295,770
Unamortized debt issuance costs	3,783	4,230
Notes payable interest rate (as a percent)			5.75%
Medium-term Notes | Term Loan Agreement
Debt Instrument [Line Items]
Total long term debt	198,906	198,657
Unamortized debt issuance costs	1,094	1,343
Notes Payable
Debt Instrument [Line Items]
Total long term debt	$ 3,192	$ 3,392
Notes Payable | Minimum
Debt Instrument [Line Items]
Notes payable interest rate (as a percent)	2.00%	2.00%
Notes Payable | Maximum
Debt Instrument [Line Items]
Notes payable interest rate (as a percent)	5.00%	5.00%
Notes Payable | Vehicle and Equipment
Debt Instrument [Line Items]
Total long term debt	$ 68,759	$ 67,493
Notes Payable | Vehicle and Equipment | Minimum
Debt Instrument [Line Items]
Notes payable interest rate (as a percent)	1.90%	1.90%
Notes Payable | Vehicle and Equipment | Maximum
Debt Instrument [Line Items]
Notes payable interest rate (as a percent)	4.80%	4.80%

Long-Term Debt - Schedule Of Ma

Long-Term Debt - Schedule Of Maturities Of Long Term Debt (Details) $ in Thousands	Sep. 30, 2021USD ($)
Maturities of Long-term Debt [Abstract]
Remainder of 2021	$ 6,425
2022	23,548
2023	18,477
2024	12,684
2025	209,147
Thereafter	$ 301,670

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Details) - USD ($)	1 Months Ended		9 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Term loan facility maturity period (in years)		5 years
Property and equipment, net			$ 104,977,000	$ 104,022,000
Vehicle and Equipment
Debt Instrument [Line Items]
Assets relating to master loan agreements, gross			135,400,000	132,200,000
Property and equipment, net			$ 66,400,000	$ 65,700,000
Master Loan Agreements
Debt Instrument [Line Items]
Term loan facility maturity period (in years)			60 months
5.75% Senior Notes Due 2028 | Senior Notes
Debt Instrument [Line Items]
Notes payable interest rate (as a percent)		5.75%
Debt instrument, face amount		$ 300,000,000
Market capitalization (as percent)		2.00%
Term Loan Amendment Agreement
Debt Instrument [Line Items]
Debt instrument, face amount	$ 400,000,000
Term loan facility maturity period (in years)	7 years
Deferred financing costs and debt issuance costs, net			$ 198,900,000
Term Loan Amendment Agreement | Term Loan
Debt Instrument [Line Items]
Margin interest rate (as percent)	1.25%
Term Loan Amendment Agreement | Term Loan | LIBOR | Minimum
Debt Instrument [Line Items]
Margin interest rate (as percent)	2.25%
Term Loan Amendment Agreement | Term Loan | LIBOR | Maximum
Debt Instrument [Line Items]
Margin interest rate (as percent)	2.50%
ABL Credit Agreement
Debt Instrument [Line Items]
Market capitalization (as percent)		2.00%
Fixed charge coverage ratio		1
ABL Credit Agreement | Letter of Credit
Debt Instrument [Line Items]
Remaining borrowing availability			$ 155,700,000
ABL Credit Agreement | Eurodollar | Minimum
Debt Instrument [Line Items]
Margin interest rate (as percent)		1.25%
ABL Credit Agreement | Eurodollar | Maximum
Debt Instrument [Line Items]
Margin interest rate (as percent)		1.50%
ABL Credit Agreement | Base Rate | Minimum
Debt Instrument [Line Items]
Margin interest rate (as percent)		0.25%
ABL Credit Agreement | Base Rate | Maximum
Debt Instrument [Line Items]
Margin interest rate (as percent)		0.50%
ABL Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit maximum borrowing capacity		$ 200,000,000
ABL Credit Agreement | Letter of Credit
Debt Instrument [Line Items]
Line of credit maximum borrowing capacity		75,000,000
ABL Credit Agreement | Incremental Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit maximum borrowing capacity		50,000,000
ABL Credit Agreement | Swing Line Loans
Debt Instrument [Line Items]
Line of credit maximum borrowing capacity		$ 20,000,000

Leases - Schedule of Supplement

Leases - Schedule of Supplemental Balance Sheet Information Related To Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Non-Current
Operating	$ 61,028	$ 53,766
Finance	5,019	4,946
Total lease assets	$ 66,047	$ 58,712
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property and equipment, net	Property and equipment, net
Current
Operating	$ 21,278	$ 18,758
Financing	1,780	2,073
Non-Current
Operating	39,155	34,413
Financing	3,038	2,430
Total lease liabilities	$ 65,251	$ 57,674
Weighted-average remaining lease term:
Operating leases (in years)	3 years 10 months 24 days	4 years 1 month 6 days
Finance leases (in years)	3 years 2 months 12 days	2 years 7 months 6 days
Weighted-average discount rate:
Operating leases (as percent)	3.37%	3.67%
Finance leases (as percent)	4.95%	5.08%

Leases - Lease Costs (Details)

Leases - Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Lessee, Lease, Description [Line Items]
Operating lease costs	$ 6,927	$ 5,760	$ 19,947	$ 16,972
Finance lease cost
Amortization of leased assets	769	856	2,342	2,762
Interest on finance lease obligations	54	64	161	207
Total lease costs	7,750	6,680	22,450	19,941
Operating Lease
Finance lease cost
Variable lease costs	700	600	2,200	1,900
Short-term lease costs	300	200	800	600
Finance Lease
Finance lease cost
Variable lease costs	$ 200	$ 200	$ 500	$ 600

Leases - Other Information (Det

Leases - Other Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$ 5,821	$ 4,949	$ 16,763	$ 14,501
Operating cash flows for finance leases	54	64	161	207
Financing cash flows for finance leases	$ 532	$ 606	$ 1,573	$ 1,998

Leases - Undiscounted Cash Flow

Leases - Undiscounted Cash Flows (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Finance Leases
Remainder of 2021	$ 661
2022	1,751
2023	1,278
2024	869
2025	501
Thereafter	200
Total minimum lease payments	5,260
Less: Amounts representing executory costs	(36)
Less: Amounts representing interest	(406)
Present value of future minimum lease payments	4,818
Less: Current obligation under leases	(1,780)	$ (2,073)
Finance lease obligations	3,038	2,430
Operating Leases
Remainder of 2021	6,038
2022	21,779
2023	15,784
2024	8,757
2025	5,000
Thereafter	7,496
Total minimum lease payments	64,854
Less: Amounts representing interest	(4,421)
Present value of future minimum lease payments	60,433
Less: Current obligation under leases	(21,278)	(18,758)
Operating lease obligations	39,155	$ 34,413
Related Party
Operating Leases
Remainder of 2021	342
2022	1,347
2023	906
2024	645
2025	519
Thereafter	0
Total minimum lease payments	3,759
Other
Operating Leases
Remainder of 2021	5,696
2022	20,432
2023	14,878
2024	8,112
2025	4,481
Thereafter	7,496
Total minimum lease payments	$ 61,095

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Fair Values of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financial assets:
Cash equivalents	$ 166,473	$ 170,398
Derivative financial instruments	13,567	5,130
Total financial assets	180,040	175,528
Financial liabilities:
Contingent consideration	8,591	4,004
Derivative financial instruments	774	324
Total financial liabilities	9,365	4,328
Level 1
Financial assets:
Cash equivalents	166,473	170,398
Derivative financial instruments	0	0
Total financial assets	166,473	170,398
Financial liabilities:
Contingent consideration	0	0
Derivative financial instruments	0	0
Total financial liabilities	0	0
Level 2
Financial assets:
Cash equivalents	0	0
Derivative financial instruments	13,567	5,130
Total financial assets	13,567	5,130
Financial liabilities:
Contingent consideration	0	0
Derivative financial instruments	774	324
Total financial liabilities	774	324
Level 3
Financial assets:
Cash equivalents	0	0
Derivative financial instruments	0	0
Total financial assets	0	0
Financial liabilities:
Contingent consideration	8,591	4,004
Derivative financial instruments	0	0
Total financial liabilities	$ 8,591	$ 4,004

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Change in Fair Value of Contingent Consideration (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 4,004
Preliminary purchase price	6,000
Fair value adjustments	(296)
Accretion in value	845
Amounts cancelled	(1,036)
Amounts paid to sellers	(926)
Ending balance	$ 8,591

Fair Value Measurements - Sum_2

Fair Value Measurements - Summary of Carrying Values and Associated Fair Values of Financial Assets and Liabilities (Details) - 5.75% Senior Notes Due 2028 - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Level 2
Financial assets:
Senior Notes	$ 316,197	$ 320,013
Carrying Value
Financial assets:
Senior Notes	$ 300,000	$ 300,000

Derivative and Hedging Activiti

Derivative and Hedging Activities - Additional Information (Details) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2021USD ($)	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)	Oct. 27, 2021USD ($)instrument	Aug. 31, 2020swap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cash flow hedge gain (loss) to be reclassified		$ 9.3	$ 3.4
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cash flow hedge gain (loss) to be reclassified	$ 0.8	2.4
Interest Rate Swap | Subsequent Event
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of derivatives | instrument				2
Interest Rate Swap | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Reclassification from accumulated other comprehensive income to interest expense		4.3
Interest Rate Swap | Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized loss included in accumulated other comprehensive loss associated with the terminated swaps		17.8
Notional amount of derivative instruments	$ 200	$ 200
Interest rate of derivative instruments (as a percent)	0.51%	0.51%
Interest Rate Swap | Cash Flow Hedging | Subsequent Event
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative instruments				$ 100
Interest rate of derivative instruments (as a percent)				1.37%
Term Loan
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of swaps | swap					2

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Feb. 22, 2021
Statement Of Shareholders Equity [Line Items]
Accumulated other comprehensive loss	$ 1,001		$ 8,763
Unrealized gain (loss) interest rate swaps	10,300		12,200
Cash flow hedge gain (loss) to be reclassified	$ 9,300		$ 3,400
Common stock repurchase (in shares)	0	443
Share repurchase, amount		$ 15,759
Share repurchase, price per share (in usd per share)		$ 35.59
Stock repurchase program, remaining authorized repurchase amount	$ 100,000
Maximum | Board of Directors
Statement Of Shareholders Equity [Line Items]
Stock repurchase program, authorized				$ 100,000

Stockholders' Equity - Cash Div

Stockholders' Equity - Cash Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands	Sep. 30, 2021	Aug. 05, 2021	Jun. 30, 2021	May 05, 2021	Mar. 31, 2021	Feb. 23, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Equity [Abstract]
Dividends declared (in USD per share)		$ 0.30		$ 0.30		$ 0.30	$ 0.30	$ 0	$ 0.90	$ 0
Amount Declared		$ 8,912		$ 8,910		$ 8,907	$ 8,912		$ 26,729
Amount Paid	$ 8,821		$ 8,821		$ 8,786				$ 26,428	$ 0

Employee Benefits - Additional

Employee Benefits - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)shares	Sep. 30, 2020USD ($)shares	Sep. 30, 2021USD ($)installmentshares	Sep. 30, 2020USD ($)shares	Dec. 31, 2020USD ($)
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Healthcare benefit expense, net of employee contributions | $	$ 6,500	$ 5,500	$ 20,600	$ 18,200
Accrued compensation | $	60,623		60,623		$ 45,876
Administration expense related to employee contribution plan | $	$ 500	$ 400	$ 1,900	$ 1,600
Share-based awards granted (in shares)	7,000,000	3,000,000	200,000	100,000
Number of shares surrendered to satisfy tax withholding obligations			43,000	25,000
Share based compensation, recognized tax benefits | $	$ 3,000		$ 3,000
Tax shortfall | $		$ 300		$ 300
2014 Omnibus Incentive Plan
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Common stock shares available for issuance (in shares)	1,900,000		1,900,000
Common stock shares authorized (in shares)	3,000,000		3,000,000
Performance-Based Stock Awards
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Share-based awards granted (in shares)			42,449
Liability Performance-Based Stock Awards
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Share-based awards granted (in shares)	5,000	7,000	5,000	7,000
Directors
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Share-based awards granted (in shares)	4,000,000	6,000,000	4,000,000	6,000,000
Vesting period (in years)			1 year
Officer | Performance-Based Stock Awards
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Share-based awards granted (in shares)			100,000
Officer | Performance-Based Stock Awards | Common Stock
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Number of equal installments for common stock | installment			2
Cost of sales
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Workers' compensation expense | $	$ 4,800	$ 4,100	$ 11,900	$ 11,400
Medical IBNR Included in Accrued Compensation
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Accrued compensation | $	$ 3,200		$ 3,200		$ 3,100

Employee Benefits - Summary of

Employee Benefits - Summary of Workers' Compensation Known Claims and IBNR Reserves (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Postemployment Benefits [Abstract]
Included in other current liabilities	$ 6,775	$ 7,703
Included in other long-term liabilities	12,490	11,986
Workers' compensation liability	$ 19,265	$ 19,689

Employee Benefits - Schedule of

Employee Benefits - Schedule of Insurance Receivable for Claims (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Postemployment Benefits [Abstract]
Included in other non-current assets	$ 2,082	$ 1,854

Employee Benefits - Summary o_2

Employee Benefits - Summary of Equity-Based Awards for Employees (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Awards
Granted (in shares)	7,000,000	3,000,000	200,000	100,000
Common Stock Awards
Awards
Nonvested common stock awards, Beginning balance (in shares)			231,280
Granted (in shares)			55,815
Vested (in shares)			(84,254)
Forfeited/Cancelled (in shares)			(2,448)
Nonvested common stock awards, Ending balance (in shares)	200,393		200,393
Weighted Average Grant Date Fair Value Per Share
Nonvested performance-based stock awards, Beginning balance (in USD per share)			$ 48.05
Granted (in USD per share)			124.88
Vested (in USD per share)			48.81
Forfeited/Cancelled (in USD per share)			57.85
Nonvested performance-based stock awards, Ending balance (in USD per share)	$ 69.01		$ 69.01
Performance-Based Stock Awards
Awards
Nonvested performance-based stock awards/units, Beginning balance (in shares)			166,961
Granted (in shares)			42,449
Vested (in shares)			(64,525)
Forfeited/Cancelled (in shares)			0
Nonvested performance-based stock awards/units, Ending balance (in shares)	144,885		144,885
Weighted Average Grant Date Fair Value Per Share
Nonvested performance-based stock awards/units, Beginning balance (in USD per share)			$ 59.97
Granted (in USD per share)			123.32
Vested (in USD per share)			52.79
Forfeited/Cancelled (in USD per share)			0
Nonvested performance-based stock awards/units, Ending balance (in USD per share)	$ 81.73		$ 81.73
Performance-Based Restricted Stock Units
Awards
Nonvested performance-based stock awards/units, Beginning balance (in shares)			13,273
Granted (in shares)			8,470
Vested (in shares)			(12,952)
Forfeited/Cancelled (in shares)			(488)
Nonvested performance-based stock awards/units, Ending balance (in shares)	8,303		8,303
Weighted Average Grant Date Fair Value Per Share
Nonvested performance-based stock awards/units, Beginning balance (in USD per share)			$ 36.51
Granted (in USD per share)			126.89
Vested (in USD per share)			36.51
Forfeited/Cancelled (in USD per share)			67.44
Nonvested performance-based stock awards/units, Ending balance (in USD per share)	$ 126.89		$ 126.89

Employee Benefits - Summary o_3

Employee Benefits - Summary of Share-Based Compensation Expense Under the 2014 Omnibus Incentive Plan (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 3,535	$ 2,635	$ 10,228	$ 8,050
2014 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	3,535	2,635	10,228	8,050
2014 Omnibus Incentive Plan | Common Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	1,426	997	3,843	3,006
2014 Omnibus Incentive Plan | Common Stock Awards | Non-Employee Common Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	126	104	339	230
2014 Omnibus Incentive Plan | Performance-Based Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	1,128	928	3,462	2,844
2014 Omnibus Incentive Plan | Liability Performance-Based Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	598	488	1,983	1,554
2014 Omnibus Incentive Plan | Performance-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 257	$ 118	$ 601	$ 416

Employee Benefits - Summary o_4

Employee Benefits - Summary of Stock Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 3,535	$ 2,635	$ 10,228	$ 8,050
Cost of sales
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	161	60	287	221
Selling
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	56	45	145	154
Administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 3,318	$ 2,530	$ 9,796	$ 7,675

Employee Benefits - Unrecognize

Employee Benefits - Unrecognized Share-Based Compensation Expense Related to Unvested Awards (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense on Unvested Awards	$ 15,836
Common Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense on Unvested Awards	$ 9,201
Weighted Average Remaining Vesting Period (in years)	1 year 9 months 18 days
Performance-Based Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense on Unvested Awards	$ 6,082
Weighted Average Remaining Vesting Period (in years)	1 year 8 months 12 days
Performance-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense on Unvested Awards	$ 553
Weighted Average Remaining Vesting Period (in years)	6 months

Income Taxes (Details)

Income Taxes (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Effective tax rate (as percent)	26.10%	25.80%	23.50%	26.20%

Related Party Transactions - Sc

Related Party Transactions - Schedule of Related Party Transactions (Details) - Affiliated Entity - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Related Party Transaction [Line Items]
Sales	$ 260	$ 373	$ 1,081	$ 3,761
Purchases	486	331	1,218	1,457
Rent	$ 370	$ 297	$ 983	$ 867

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Affiliated Entity
Related Party Transaction [Line Items]
Accounts receivable, related parties	$ 0.5	$ 0.7

Commitments and Contingencies -

Commitments and Contingencies - Schedule of Accrued General Insurance Reserves (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Included in other current liabilities	$ 4,894	$ 5,102
Included in other long-term liabilities	17,845	16,440
Total	$ 22,739	$ 21,542

Commitments and Contingencies_2

Commitments and Contingencies - Schedule of Insurance Receivable for Claims (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Commitments And Contingencies Disclosure [Line Items]
Total insurance receivables and indemnification assets included in other non-current assets	$ 2,082	$ 1,854
General Liability
Commitments And Contingencies Disclosure [Line Items]
Insurance receivables and indemnification assets for claims under fully insured policies	3,969	4,400
Insurance receivables for claims that exceeded the stop loss limit	327	328
Total insurance receivables and indemnification assets included in other non-current assets	$ 4,296	$ 4,728

Commitments and Contingencies_3

Commitments and Contingencies - Additional Information (Details) $ in Millions	7 Months Ended	9 Months Ended
	Sep. 30, 2021USD ($)	Sep. 30, 2021USD ($)
Commitments And Contingencies Disclosure [Line Items]
Purchase obligation, 2021	$ 15	$ 15
Payments for purchase obligation		10.3
IWI
Commitments And Contingencies Disclosure [Line Items]
Payments for purchase obligation	1.9
Reduced purchase obligation	$ 3.3	$ 3.3

Business Combinations - Additio

Business Combinations - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)segment	Sep. 30, 2020USD ($)segment
Business Acquisition [Line Items]
Number of businesses acquired | segment			7	5
Acquisition-related costs	$ (300)	$ 800	$ 1,600	$ 2,000
Goodwill deduction for tax purposes	15,000		15,000
Amortization	9,224	6,974	26,798	20,378
Income tax expense	12,320	9,773	27,432	24,578
Combined Business Acquisitions
Business Acquisition [Line Items]
Amortization	300	2,900	2,200	9,700
Income tax expense	$ 200	$ 1,000	$ 1,200	$ 2,900

Business Combinations - Summary

Business Combinations - Summary of Business Acquisitions (Details) - USD ($) $ in Thousands	Sep. 13, 2021	Jun. 07, 2021	Apr. 20, 2021	Apr. 13, 2021	Mar. 01, 2021	Aug. 31, 2020	Aug. 10, 2020	Feb. 29, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Business Acquisition [Line Items]
Cash Paid											$ 96,141	$ 38,825
Seller Obligations											18,987	6,969
Total  Purchase Price											115,128	45,794
Revenue									$ 23,188	$ 9,630	43,966	14,201
Net Income (Loss)									699	(90)	2,295	220
IWI
Business Acquisition [Line Items]
Cash Paid					$ 42,098						42,098
Seller Obligations					5,959						5,959
Total  Purchase Price					$ 48,057
Revenue									10,556		24,315
Net Income (Loss)									590		2,068
Alert
Business Acquisition [Line Items]
Cash Paid				$ 5,850							5,850
Seller Obligations				2,980							2,980
Total  Purchase Price				$ 8,830
Revenue									4,764		8,890
Net Income (Loss)									2		147
Alpine
Business Acquisition [Line Items]
Cash Paid			$ 7,945								7,945
Seller Obligations			2,208								2,208
Total  Purchase Price			$ 10,153
Revenue									3,045		4,996
Net Income (Loss)									263		216
GCP
Business Acquisition [Line Items]
Cash Paid		$ 9,700									9,700
Seller Obligations		1,427									1,427
Total  Purchase Price		$ 11,127
Revenue									2,624		3,270
Net Income (Loss)									(152)		(118)
Five Star
Business Acquisition [Line Items]
Cash Paid	$ 26,308										26,308
Seller Obligations	5,466										5,466
Total  Purchase Price	$ 31,774
Revenue									1,243		1,243
Net Income (Loss)									25		25
Other
Business Acquisition [Line Items]
Cash Paid											4,240	5,035
Seller Obligations											947	1,538
Total  Purchase Price											5,187	6,573
Revenue									956	1,879	1,252	2,643
Net Income (Loss)									$ (29)	(252)	$ (43)	(291)
Royals
Business Acquisition [Line Items]
Cash Paid								$ 7,590				7,590
Seller Obligations								2,500				2,500
Total  Purchase Price								$ 10,090
Revenue										2,843		6,650
Net Income (Loss)										279		628
Energy One
Business Acquisition [Line Items]
Cash Paid							$ 13,200					13,200
Seller Obligations							1,595					1,595
Total  Purchase Price							$ 14,795
Revenue										2,853		2,853
Net Income (Loss)										(202)		(202)
Storm Master
Business Acquisition [Line Items]
Cash Paid						$ 13,000						13,000
Seller Obligations						1,336						1,336
Total  Purchase Price						$ 14,336
Revenue										2,055		2,055
Net Income (Loss)										$ 85		$ 85

Business Combinations - Summa_2

Business Combinations - Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Sep. 13, 2021	Jun. 07, 2021	Apr. 20, 2021	Apr. 13, 2021	Mar. 01, 2021	Aug. 31, 2020	Aug. 10, 2020	Feb. 29, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Business Acquisition [Line Items]
Goodwill									$ 257,106		$ 216,870
Less seller obligations									18,987	$ 6,969
Cash Paid									96,141	38,825
2021 Acquisitions
Business Acquisition [Line Items]
Cash									1,640
Accounts receivable									17,942
Inventories									3,818
Other current assets									3,422
Property and equipment									4,126
Intangibles									59,370
Goodwill									40,206
Other non-current assets									396
Accounts payable and other current liabilities									(6,143)
Deferred income tax liabilities									(6,537)
Other long-term liabilities									(3,112)
Fair value of assets acquired and purchase price									115,128
Less seller obligations									18,987
Cash Paid									96,141
IWI
Business Acquisition [Line Items]
Cash									168
Accounts receivable									5,122
Inventories									1,157
Other current assets									2,354
Property and equipment									796
Intangibles									25,200
Goodwill									25,212
Other non-current assets									264
Accounts payable and other current liabilities									(3,349)
Deferred income tax liabilities									(6,537)
Other long-term liabilities									(2,330)
Fair value of assets acquired and purchase price									48,057
Less seller obligations					$ 5,959				5,959
Cash Paid					$ 42,098				42,098
Alert
Business Acquisition [Line Items]
Cash									0
Accounts receivable									4,710
Inventories									765
Other current assets									738
Property and equipment									693
Intangibles									2,770
Goodwill									940
Other non-current assets									132
Accounts payable and other current liabilities									(1,184)
Deferred income tax liabilities									0
Other long-term liabilities									(734)
Fair value of assets acquired and purchase price									8,830
Less seller obligations				$ 2,980					2,980
Cash Paid				$ 5,850					5,850
Alpine
Business Acquisition [Line Items]
Cash									0
Accounts receivable									0
Inventories									359
Other current assets									0
Property and equipment									726
Intangibles									5,543
Goodwill									3,582
Other non-current assets									0
Accounts payable and other current liabilities									(57)
Deferred income tax liabilities									0
Other long-term liabilities									0
Fair value of assets acquired and purchase price									10,153
Less seller obligations			$ 2,208						2,208
Cash Paid			$ 7,945						7,945
GCP
Business Acquisition [Line Items]
Cash									0
Accounts receivable									3,067
Inventories									0
Other current assets									0
Property and equipment									206
Intangibles									5,670
Goodwill									2,695
Other non-current assets									0
Accounts payable and other current liabilities									(493)
Deferred income tax liabilities									0
Other long-term liabilities									(18)
Fair value of assets acquired and purchase price									11,127
Less seller obligations		$ 1,427							1,427
Cash Paid		$ 9,700							9,700
Five Star
Business Acquisition [Line Items]
Cash									1,472
Accounts receivable									4,597
Inventories									1,399
Other current assets									330
Property and equipment									1,161
Intangibles									17,400
Goodwill									6,482
Other non-current assets									0
Accounts payable and other current liabilities									(1,040)
Deferred income tax liabilities									0
Other long-term liabilities									(27)
Fair value of assets acquired and purchase price									31,774
Less seller obligations	$ 5,466								5,466
Cash Paid	$ 26,308								26,308
Two Thousand Twenty Acquisitions
Business Acquisition [Line Items]
Accounts receivable										9,978
Inventories										1,570
Other current assets										587
Property and equipment										4,065
Intangibles										22,146
Goodwill										11,647
Other non-current assets										74
Accounts payable and other current liabilities										(4,074)
Other long-term liabilities										(199)
Fair value of assets acquired and purchase price										45,794
Less seller obligations										6,969
Cash Paid										38,825
Royals
Business Acquisition [Line Items]
Accounts receivable										2,848
Inventories										305
Other current assets										430
Property and equipment										598
Intangibles										3,930
Goodwill										3,015
Other non-current assets										58
Accounts payable and other current liabilities										(1,059)
Other long-term liabilities										(35)
Fair value of assets acquired and purchase price										10,090
Less seller obligations								$ 2,500		2,500
Cash Paid								$ 7,590		7,590
Energy One
Business Acquisition [Line Items]
Accounts receivable										3,350
Inventories										812
Other current assets										12
Property and equipment										2,319
Intangibles										6,500
Goodwill										3,304
Other non-current assets										0
Accounts payable and other current liabilities										(1,483)
Other long-term liabilities										(19)
Fair value of assets acquired and purchase price										14,795
Less seller obligations							$ 1,595			1,595
Cash Paid							$ 13,200			13,200
Storm Master
Business Acquisition [Line Items]
Accounts receivable										2,362
Inventories										175
Other current assets										0
Property and equipment										798
Intangibles										8,720
Goodwill										3,631
Other non-current assets										0
Accounts payable and other current liabilities										(1,336)
Other long-term liabilities										(14)
Fair value of assets acquired and purchase price										14,336
Less seller obligations						$ 1,336				1,336
Cash Paid						$ 13,000				13,000
Other
Business Acquisition [Line Items]
Cash									0
Accounts receivable									446	1,418
Inventories									138	278
Other current assets									0	145
Property and equipment									544	350
Intangibles									2,787	2,996
Goodwill									1,295	1,697
Other non-current assets									0	16
Accounts payable and other current liabilities									(20)	(196)
Deferred income tax liabilities									0
Other long-term liabilities									(3)	(131)
Fair value of assets acquired and purchase price									5,187	6,573
Less seller obligations									947	1,538
Cash Paid									$ 4,240	$ 5,035

Business Combinations - Estimat

Business Combinations - Estimates of Acquired Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$ 43,115	$ 14,528
Weighted Average Estimated Useful Life (in years)	12 years	8 years
Trademarks and tradenames
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$ 10,147	$ 3,796
Weighted Average Estimated Useful Life (in years)	15 years	15 years
Covenants not-to-compete
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$ 4,530	$ 1,946
Weighted Average Estimated Useful Life (in years)	5 years	5 years
Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$ 1,578	$ 1,876
Weighted Average Estimated Useful Life (in years)	1 year 6 months	1 year 6 months

Business Combinations - Pro For

Business Combinations - Pro Forma Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Business Acquisition, Pro Forma Information [Abstract]
Net revenue	$ 516,057	$ 465,639	$ 1,474,979	$ 1,356,619
Net income	$ 35,574	$ 30,876	$ 93,262	$ 77,604
Basic net income per share (in USD per share)	$ 1.21	$ 1.05	$ 3.18	$ 2.63
Diluted net income per share (in USD per share)	$ 1.20	$ 1.04	$ 3.15	$ 2.61

Income Per Common Share - Addit

Income Per Common Share - Additional Information (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Dilutive effect of outstanding restricted stock awards after application of the Treasury Stock Method (in shares)	216	219	260	188
Common stock shares excluded from calculation of diluted net income per common share (in shares)			2

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands	Nov. 04, 2021	Nov. 01, 2021	Aug. 05, 2021	May 05, 2021	Feb. 23, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Oct. 27, 2021
Subsequent Event [Line Items]
Total Purchase Price								$ 115,128	$ 45,794
Cash dividends declared per share (in USD per share)			$ 0.30	$ 0.30	$ 0.30	$ 0.30	$ 0	$ 0.90	$ 0
Interest Rate Swap | Cash Flow Hedging
Subsequent Event [Line Items]
Notional amount of derivative instruments						$ 200,000		$ 200,000
Interest rate of derivative instruments (as a percent)						0.51%		0.51%
Subsequent Event
Subsequent Event [Line Items]
Cash dividends declared per share (in USD per share)	$ 0.30
Subsequent Event | Interest Rate Swap | Cash Flow Hedging
Subsequent Event [Line Items]
Notional amount of derivative instruments										$ 100,000
Interest rate of derivative instruments (as a percent)										1.37%
Subsequent Event | Denison Glass And Mirror
Subsequent Event [Line Items]
Total Purchase Price		$ 13,700

Uncategorized Items - ibp-20210

Label	Element	Value
Amortization Of Terminated Interest Rate Swap	ibp_AmortizationOfTerminatedInterestRateSwap	$ 2,414,000