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Long-term Debt and Lease Obligations - Equipment Capital Leases (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Equipment Capital Leases  
2019 $ 972
2020 120,569
Total 121,541
Second Lien Notes  
Equipment Capital Leases  
2019 0
2020 120,569
Total 120,569
Other Financing  
Equipment Capital Leases  
2019 972
2020 0
Total $ 972