Income Taxes (Components of the Provision for Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 7,718	$ (19,461)	$ 374,602
Foreign	63,205	70,146	56,526
State	1,697	16,259	3,075
Total current	72,620	66,944	434,203
Deferred:
Federal	(35,932)	1,899	52,842
Foreign	(209,010)	(14,804)	(5,468)
State	9	(251)	46,784
Total deferred	(244,933)	(13,156)	94,158
Total provision	$ (172,313)	$ 53,788	$ 528,361