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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Contingency [Line Items]      
Undistributed earnings of certain foreign subsidiaries $ 58,500 $ 77,400  
Tax expense related to valuation allowance 40,600 6,600  
Unrecognized tax benefits, net 4,100    
Unrecognized tax benefits that, if recognized, would impact effective tax rate 3,600    
Interest and penalties related to uncertain tax positions 0 0 $ 0
Accrued penalties and interest related to uncertain tax positions 0 0  
State and Local Jurisdiction      
Income Tax Contingency [Line Items]      
Operating loss carry forwards 511,500 608,700  
Domestic Tax Authority      
Income Tax Contingency [Line Items]      
Operating loss carry forwards 19,800 31,300  
Foreign Tax Authority      
Income Tax Contingency [Line Items]      
Operating loss carry forwards $ 76,400 $ 58,600