Acquisitions - Contingent Earn-out Obligation (Details) - USD ($) $ in Thousands		5 Months Ended	12 Months Ended
	Aug. 01, 2021	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Revenues			$ 3,073,636	$ 2,856,659	$ 2,615,277
Federal
Business Acquisition [Line Items]
Net operating loss carryforwards		$ 34,200	34,200
State
Business Acquisition [Line Items]
Net operating loss carryforwards		61,700	$ 61,700
Amteck
Business Acquisition [Line Items]
Number of milestones	four
Revenues		$ 83,500
Contingent earn-out period	53 months
Amteck | Minimum
Business Acquisition [Line Items]
Contingent earn-out estimated milestone payment, minimum	$ 100
Cash flow discount rate	14.80%
Amteck | Minimum | Measurement Input, Inception Discount Rate [Member]
Business Acquisition [Line Items]
Cash flow discount rate	14.00%
Amteck | Maximum
Business Acquisition [Line Items]
Contingent earn-out estimated milestone payment, maximum	$ 11,400
Cash flow discount rate	15.20%
Amteck | Maximum | Measurement Input, Inception Discount Rate [Member]
Business Acquisition [Line Items]
Cash flow discount rate	18.50%