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Fair Value Measurements - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Fair Value Measurements [Line Items]      
Debt Instrument, Fair Value Disclosure $ 586,200 $ 594,400  
Gains (Losses) on Extinguishment of Debt $ 0 (257) $ (8,239)
7.625% Senior Notes      
Fair Value Measurements [Line Items]      
Gains (Losses) on Extinguishment of Debt     $ (7,900)
8.75% Senior Notes      
Fair Value Measurements [Line Items]      
Debt, stated interest rate 8.75%    
Debt Instrument, Fair Value Disclosure $ 251,200 264,700  
7.0% Senior Notes      
Fair Value Measurements [Line Items]      
Debt, stated interest rate 7.00%   7.00%
Debt Instrument, Fair Value Disclosure $ 335,000 329,700  
Amended Credit Facility      
Fair Value Measurements [Line Items]      
Debt Instrument, Fair Value Disclosure $ 140,000 0  
Gains (Losses) on Extinguishment of Debt   (300)  
Lease Financing Obligation      
Fair Value Measurements [Line Items]      
Debt Instrument, Fair Value Disclosure   $ 1,800