Income Taxes (Details) - Summary of Components of Income Before Income Taxes - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
U.S.	$ (135,757)	$ 182,178	$ 165,848
Non-U.S.	7,940	106,253	106,363
(Loss) income before income taxes	$ (127,817)	$ 288,431	$ 272,211