Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 208,339	$ 140,064	$ 330,191
State	58,026	32,990	47,228
International	15,545	7,557	3,422
Total current income tax	281,910	180,611	380,841
Deferred:
Federal	44,263	52,034	(98,760)
State	(25,836)	21,096	37,347
International	(20,709)	4,659	4,431
Total deferred income tax	(2,282)	77,789	(56,982)
Continuing operations	$ 279,628	$ 258,400	$ 323,859