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Debt - Second Lien Notes (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Feb. 20, 2020
Feb. 20, 2020
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Debt Instrument            
Loss from extinguishment of debt     $ 0 $ 0 $ (39,059) $ 0
Second Lien Notes | Senior Notes            
Debt Instrument            
Redemption price, percentage (equal to) 100.00%          
Repayments of debt $ 537,500          
Loss from extinguishment of debt   $ (39,100)