Income Taxes - Summary of Components of Income Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
U.S.	$ 34,159	$ (135,757)	$ 182,178
Non-U.S.	146,962	7,940	106,253
Income (loss) before income taxes	$ 181,121	$ (127,817)	$ 288,431