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Fair Value Measurements (Details) - 10.75 % Senior Notes due 2023 - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt instrument, fair value $ 297,844 $ 297,269
Fair Value | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt instrument, fair value $ 213,246 $ 257,806