Goodwill, Identifiable Intangible Assets, And Other Long-Lived Assets - Schedule of Finite-lived and Indefinite-lived Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Accumulated Amortization	$ (673,735)	$ (606,592)
Total	345,694
Trade names (indefinite-lived), Accumulated Impairment Charge	(58,933)	(58,933)
Gross Carrying Amount, Trade names (indefinite-lived)	299,271	289,121
Total, Trade names (indefinite-lived)	240,338	230,188
Gross Carrying Amount, Total	1,323,534	1,264,334
Accumulated Impairment Charge, Total	(63,767)	(63,767)
Total	586,032	593,975
Customer relationships
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	807,766	762,516
Accumulated Amortization	(482,594)	(427,211)
Accumulated Impairment Charge	(4,834)	(4,834)
Total	320,338	330,471
Developed technology/Vendor network
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	95,661	95,661
Accumulated Amortization	(78,788)	(74,238)
Accumulated Impairment Charge	0	0
Total	16,873	21,423
Trade names (finite-lived)
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	35,991	33,791
Accumulated Amortization	(27,800)	(25,690)
Accumulated Impairment Charge	0	0
Total	8,191	8,101
Contract backlog
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Gross Carrying Amount	84,845	83,245
Accumulated Amortization	(84,553)	(79,453)
Accumulated Impairment Charge	0	0
Total	$ 292	$ 3,792