Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ 47,171	$ 208,339	$ 140,064
State	21,442	58,026	32,990
International	17,481	15,545	7,557
Total current income tax	86,094	281,910	180,611
Deferred:
Federal	198,623	44,263	52,034
State	27,206	(25,836)	21,096
International	2,009	(20,709)	4,659
Total deferred income tax	227,838	(2,282)	77,789
Continuing operations	$ 313,932	$ 279,628	$ 258,400