Income Taxes - Income Before Tax and Provision for Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income (loss) before income taxes
U.S. operations	$ 659,937	$ 70,484	$ 138,950
Non-U.S. operations	36,426	42,680	40,641
Income before income taxes and noncontrolling interest	696,363	113,164	179,591
Current provision (benefit)
Federal	49,047	(9,991)	2,690
State and Local	18,697	65	38
Foreign	4,276	1,219	5,210
Deferred provision (benefit)
Federal	4,986	106,415	13,547
State and Local	(1,599)	(3,380)	194
Foreign	764	(62)	(428)
Provision for income taxes	$ 76,171	$ 94,266	$ 21,251