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Debt - Second Lien Notes (Details) - USD ($)
$ in Thousands
3 Months Ended
Feb. 20, 2020
Mar. 31, 2021
Mar. 31, 2020
Debt Instrument      
Loss on extinguishment of debt   $ 0 $ 39,059
Second Lien Notes | Senior Notes      
Debt Instrument      
Redemption price, percentage (equal to) 100.00%    
Repayments of debt $ 537,500    
Loss on extinguishment of debt     $ 39,100