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Debt (Components of Debt) (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
8.75% Senior Notes due 2023 $ 300,000 $ 300,000
Credit facility 145,000 130,000
Installment note payable 58 371
Financing lease obligations 1,549 1,653
Unamortized debt issuance costs (9,355) (10,038)
Total debt, net 437,252 421,986
Less current portion 497 594
Total long-term debt, net $ 436,755 $ 421,392
8.75% Senior Notes due 2023    
Debt Instrument [Line Items]    
Debt instrument, interest rate stated percentage 8.75%