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Income Taxes - Significant Components of (Loss) Income Before Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
U.S. $ (476,925) $ 56,114 $ 122,162
Non-U.S. 1,646 815 0
(Loss) income before income taxes $ (475,279) $ 56,929 $ 122,162