Annual report pursuant to Section 13 and 15(d)

LONG-TERM DEBT - Summary of Long-Term Debt (Details)

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LONG-TERM DEBT - Summary of Long-Term Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
May 17, 2021
Dec. 31, 2020
Debt Instrument [Line Items]      
Net unamortized debt issuance costs $ (1,054)   $ 0
Total Debt, net 712,946   2,258,962
Less: current maturities of long term debt 0 $ (60,000) (253,743)
Less: amounts reclassified to liabilities subject to compromise 0   (2,005,219)
Long-term debt, net of current maturities 712,946 $ 792,751 0
8.000% senior unsecured notes due 2026      
Debt Instrument [Line Items]      
Long-term debt $ 550,000   0
Stated interest rate 8.00%    
Building loan      
Debt Instrument [Line Items]      
Long-term debt $ 0   21,914
Senior notes | 6.625% senior unsecured notes due 2023      
Debt Instrument [Line Items]      
Long-term debt $ 0   324,583
Stated interest rate 6.625%    
Senior notes | 6.000% senior unsecured notes due 2024      
Debt Instrument [Line Items]      
Long-term debt $ 0   579,568
Stated interest rate 6.00%    
Senior notes | 6.375% senior unsecured notes due 2025      
Debt Instrument [Line Items]      
Long-term debt $ 0   507,870
Stated interest rate 6.375%    
Senior notes | 6.375% senior unsecured notes due 2026      
Debt Instrument [Line Items]      
Long-term debt $ 0   374,617
Stated interest rate 6.375%    
Line of Credit | New Credit Facility      
Debt Instrument [Line Items]      
Long-term debt     0
Line of Credit | DIP credit facility      
Debt Instrument [Line Items]      
Long-term debt $ 0   157,500
Line of Credit | Pre-petition revolving credit facility      
Debt Instrument [Line Items]      
Long-term debt $ 0   $ 292,910