Business Combinations - Summary of Business Acquisitions (Detail) - USD ($) $ in Thousands																		12 Months Ended
	Dec. 12, 2021	Nov. 22, 2021	Nov. 01, 2021	Sep. 13, 2021	Jun. 07, 2021	Apr. 19, 2021	Apr. 13, 2021	Mar. 01, 2021	Nov. 16, 2020	Oct. 26, 2020	Oct. 13, 2020	Aug. 31, 2020	Aug. 10, 2020	Feb. 29, 2020	Nov. 18, 2019	Jun. 24, 2019	Mar. 18, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Cash Paid																		$ 243,015	$ 76,446	$ 52,040
Seller Obligations																		29,169	14,086	7,543
Total Purchase Price																		272,184	90,532	59,583
Revenue																		82,431	40,494	21,812
Net Income (Loss)																		2,639	1,892	592
IWI
Business Acquisition [Line Items]
Cash Paid								$ 42,098										42,098
Seller Obligations								5,959										5,959
Total Purchase Price								48,057
Revenue								36,259
Net Income (Loss)								$ 3,373
Alert
Business Acquisition [Line Items]
Cash Paid							$ 5,850											5,850
Seller Obligations							2,980											2,980
Total Purchase Price							8,830
Revenue							13,494
Net Income (Loss)							$ (151)
Alpine
Business Acquisition [Line Items]
Cash Paid						$ 7,945												7,945
Seller Obligations						2,208												2,208
Total Purchase Price						10,153
Revenue						8,267
Net Income (Loss)						$ 189
GCP
Business Acquisition [Line Items]
Cash Paid					$ 9,700													9,700
Seller Obligations					1,427													1,427
Total Purchase Price					11,127
Revenue					7,125
Net Income (Loss)					$ 83
Five Star
Business Acquisition [Line Items]
Cash Paid				$ 26,308														26,308
Seller Obligations				5,466														5,466
Total Purchase Price				31,774
Revenue				6,861
Net Income (Loss)				$ (119)
DGM
Business Acquisition [Line Items]
Cash Paid			$ 11,634															11,634
Seller Obligations			2,069															2,069
Total Purchase Price			$ 13,703
Revenue																		2,198
Net Income (Loss)																		(462)
CFI
Business Acquisition [Line Items]
Cash Paid		$ 13,450																13,450
Seller Obligations		1,145																1,145
Total Purchase Price		$ 14,595
Revenue																		1,289
Net Income (Loss)																		53
AMD
Business Acquisition [Line Items]
Cash Paid	$ 119,490																	119,490
Seller Obligations	6,631																	6,631
Total Purchase Price	$ 126,121
Revenue																		3,707
Net Income (Loss)																		(225)
Royals
Business Acquisition [Line Items]
Cash Paid														$ 7,590					7,590
Seller Obligations														2,500					2,500
Total Purchase Price														10,090
Revenue														11,095
Net Income (Loss)														$ 1,332
Energy One
Business Acquisition [Line Items]
Cash Paid													$ 13,200						13,200
Seller Obligations													1,591						1,591
Total Purchase Price													14,791
Revenue													7,454
Net Income (Loss)													$ (558)
Storm Master
Business Acquisition [Line Items]
Cash Paid												$ 13,000							13,000
Seller Obligations												1,336							1,336
Total Purchase Price												14,336
Revenue												8,131
Net Income (Loss)												$ 619
ICON
Business Acquisition [Line Items]
Cash Paid											$ 16,900								16,900
Seller Obligations											3,598								3,598
Total Purchase Price											20,498
Revenue											4,798
Net Income (Loss)											$ 449
Norkote
Business Acquisition [Line Items]
Cash Paid										$ 8,725									8,725
Seller Obligations										2,426									2,426
Total Purchase Price										11,151
Revenue										2,702
Net Income (Loss)										$ 417
WeatherSeal
Business Acquisition [Line Items]
Cash Paid									$ 9,500										9,500
Seller Obligations									922										922
Total Purchase Price									10,422
Revenue									766
Net Income (Loss)									$ (23)
Other
Business Acquisition [Line Items]
Cash Paid																		6,540	7,531	5,750
Seller Obligations																		1,284	1,713	1,430
Total Purchase Price																		7,824	9,244	7,180
Revenue																		3,231	5,548	3,339
Net Income (Loss)																		$ (102)	$ (344)	23
1st State Insulation
Business Acquisition [Line Items]
Cash Paid																	$ 5,125			5,125
Seller Obligations																	1,355			1,355
Total Purchase Price																	6,480
Revenue																	9,828
Net Income (Loss)																	$ 476
Expert Insulation
Business Acquisition [Line Items]
Cash Paid																$ 16,165				16,165
Seller Obligations																1,993				1,993
Total Purchase Price																18,158
Revenue																6,484
Net Income (Loss)																$ 155
Premier
Business Acquisition [Line Items]
Cash Paid															$ 25,000					25,000
Seller Obligations															2,765					$ 2,765
Total Purchase Price															27,765
Revenue															2,161
Net Income (Loss)															$ (62)