Income Taxes - Provision For Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current, Federal	$ 82,484	$ 136,202	$ 245,189
Current, State	6,421	23,134	24,898
Current, Foreign	23,328	29,823	21,138
Total Current	112,233	189,159	291,225
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred, Federal	18,760	(23,181)	47,046
Deferred, State	402	(6,787)	2,688
Deferred, Foreign	2,385	(4,013)	1,121
Total, Deferred	21,547	(33,981)	50,855
Total Current and Deferred	$ 133,780	$ 155,178	$ 342,080