Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,344,085	$ 2,097,684
Accumulated Amortization	(706,727)	(494,275)
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,026,265	1,781,264
Accumulated Amortization	(522,462)	(328,540)
Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	201,861	201,861
Accumulated Amortization	(162,395)	(155,141)
Subcontractor Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,440	5,440
Accumulated Amortization	(5,117)	(3,757)
Non-compete Agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	14,919	13,519
Accumulated Amortization	(5,072)	(3,243)
Developed Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	95,600	95,600
Accumulated Amortization	$ (11,681)	$ (3,594)