Goodwill and Identifiable Intangible Assets, Net - Identifiable Intangible Assets, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Identifiable Intangible Assets, Net
Gross Book Value	$ 465,482	$ 477,667
Accumulated Amortization	(191,581)	(172,886)
Future amortization expense of identifiable intangible assets
2023	36,252
2024	34,063
2025	31,876
2026	31,032
2027	29,050
Thereafter	111,628
Total	$ 273,901
Customer Relationships
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	6 years 8 months 12 days
Gross Book Value	$ 340,721	330,572
Accumulated Amortization	$ (161,049)	(130,098)
Customer Relationships | Minimum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	6 years 8 months 12 days
Backlog
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	9 months 18 days
Gross Book Value	$ 3,200	32,300
Accumulated Amortization	$ (2,361)	(20,091)
Backlog | Minimum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	9 months 18 days
Trade Name
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	18 years 4 months 24 days
Gross Book Value	$ 121,561	114,795
Accumulated Amortization	$ (28,171)	$ (22,697)
Trade Name | Minimum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	18 years 4 months 24 days
Customer Relationships Noncompete Agreements and Tradenames | Minimum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	1 year
Customer Relationships Noncompete Agreements and Tradenames | Maximum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	25 years