Income Taxes (Components of Provision for Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current tax provision:
Federal	$ 21,498	$ (22,176)	$ 54,245
State	45,228	(10,234)	(7,601)
Foreign	223,328	133,146	88,436
Total current	290,054	100,736	135,080
Deferred tax provision:
Federal	(28,003)	(37,396)	(153,963)
State	(54,507)	(52,391)	(52,695)
Foreign	(12,229)	4,267	(2,030)
Total deferred	(94,739)	(85,520)	(208,688)
Provision for (benefit from) income taxes	$ 195,315	$ 15,216	$ (73,608)