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Debt - Debt Modification and Loss on Debt Extinguishment (Details) - USD ($)
$ in Thousands
12 Months Ended
Feb. 01, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Debt Instrument [Line Items]        
Loss on debt extinguishment   $ 28,267 $ 7,481 $ 8,392
Deferred financing costs   $ 8,607 $ 513 81,097
Convertible Debt | Exchanged Notes        
Debt Instrument [Line Items]        
Deferred financing costs       70,800
Convertible Debt | Exchanged Notes | General and Administrative Expense        
Debt Instrument [Line Items]        
Loss on modification of debt       $ 22,800
Lines of credit | Second Amended and Restated Credit Agreement | Term Loan        
Debt Instrument [Line Items]        
Repayments of debt $ 350,000