Goodwill and Identifiable Intangible Assets, Net - Identifiable Intangible Assets, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Identifiable Intangible Assets, Net
Finite-lived intangible assets acquired	$ 49,900	$ 16,900
Estimated Useful Life	10 years 2 months 12 days	10 years 9 months 18 days
Gross Book Value	$ 512,182	$ 465,482
Accumulated Amortization	(231,785)	(191,581)
Future amortization expense of identifiable intangible assets
2024	39,851
2025	36,095
2026	35,251
2027	33,269
2028	33,109
Thereafter	102,822
Total	$ 280,397
Customer Relationships
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	6 years 4 months 24 days
Gross Book Value	$ 376,621	340,721
Accumulated Amortization	$ (193,338)	(161,049)
Customer Relationships | Minimum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	6 years 4 months 24 days
Backlog
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	7 months 6 days
Gross Book Value	$ 5,900	3,200
Accumulated Amortization	$ (4,331)	(2,361)
Backlog | Minimum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	7 months 6 days
Trade Names [Member]
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	17 years 7 months 6 days
Gross Book Value	$ 129,661	121,561
Accumulated Amortization	$ (34,116)	$ (28,171)
Trade Names [Member] | Minimum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	17 years 7 months 6 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