Business Segments - Revenue and Long-Lived Assets by Geographic Location (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Service revenues	$ 5,795,837	$ 6,392,517	$ 7,238,142
Long-lived assets, net	476,068	458,200
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Service revenues	4,519,506	4,957,163	5,712,330
Long-lived assets, net	375,936	368,745
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Service revenues	1,276,331	1,435,354	$ 1,525,812
Long-lived assets, net	$ 100,132	$ 89,455