Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
LONG-TERM DEBT (Summary of Long-Term Debt) (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
May 17, 2021
Dec. 31, 2020
Debt Instrument [Line Items]      
Debt issuance costs $ (1,153)   $ 0
Total Debt 833,847   2,258,962
Less: current maturities of long-term debt (60,000) $ (60,000) (253,743)
Less: amounts reclassified to liabilities subject to compromise 0   (2,005,219)
Total Debt reflected as long term 773,847 $ 792,751 0
Exit Facility      
Debt Instrument [Line Items]      
Long-term debt 105,000   0
First-Out Term Loan      
Debt Instrument [Line Items]      
Long-term debt 180,000   0
8.000% senior unsecured notes due 2026      
Debt Instrument [Line Items]      
Long-term debt $ 550,000   0
Stated interest rate 8.00%    
6.625% senior unsecured notes due 2023 | Senior Notes      
Debt Instrument [Line Items]      
Long-term debt $ 0   324,583
Stated interest rate   6.625%  
6.000% senior unsecured notes due 2024 | Senior Notes      
Debt Instrument [Line Items]      
Long-term debt 0   579,568
Stated interest rate   6.00%  
6.375% senior unsecured notes due 2025 | Senior Notes      
Debt Instrument [Line Items]      
Long-term debt 0   507,870
Stated interest rate   6.375%  
6.375% senior unsecured notes due 2026 | Senior Notes      
Debt Instrument [Line Items]      
Long-term debt 0   374,617
Stated interest rate   6.375%  
Building loan      
Debt Instrument [Line Items]      
Long-term debt 0   21,914
Revolving Credit Agreement | DIP Credit Facility      
Debt Instrument [Line Items]      
Long-term debt 0   157,500
Revolving Credit Agreement | Pre-petition revolving credit facility      
Debt Instrument [Line Items]      
Long-term debt $ 0   $ 292,910