Business Segments - Revenue and Long-Lived Assets by Geographic Location (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Service revenues	$ 5,378,506	$ 5,795,837	$ 6,392,517
Long-lived assets, net	466,181	476,068
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Service revenues	4,171,327	4,519,506	4,957,163
Long-lived assets, net	343,056	375,936
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Service revenues	1,207,179	1,276,331	$ 1,435,354
Long-lived assets, net	$ 123,125	$ 100,132