Business Combinations - Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands									9 Months Ended
	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