Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 107,699	$ 99,830	$ 133,097
State	39,028	38,356	24,944
Foreign	33,227	35,007	27,079
Deferred:
Federal and state	(9,959)	(15,849)	41,717
Foreign	1,087	(30)	95
Provision (benefit) for income taxes	$ 171,082	$ 157,314	$ 226,932