Quarterly report pursuant to Section 13 or 15(d)

FRESH START ACCOUNTING (Reorganization Adjustment to Accounts Payable and Accrued Liabilities) (Details)

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FRESH START ACCOUNTING (Reorganization Adjustment to Accounts Payable and Accrued Liabilities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
May 17, 2021
Dec. 31, 2020
Reorganization, Chapter 11 [Line Items]      
Accounts payable and accrued liabilities $ 397,800 $ 506,799 $ 244,903
Payment of accrued Pre-Petition Revolving Credit Facility and DIP Credit Facility interest      
Reorganization, Chapter 11 [Line Items]      
Accounts payable and accrued liabilities   (1,022)  
Payment of professional fees at emergence      
Reorganization, Chapter 11 [Line Items]      
Accounts payable and accrued liabilities   (7,964)  
Accrued payable for claims to be settled via Unsecured Claims Distribution Trust      
Reorganization, Chapter 11 [Line Items]      
Accounts payable and accrued liabilities   1,000  
Accrued payable for claims to be settled via Convenience Claims Cash Pool      
Reorganization, Chapter 11 [Line Items]      
Accounts payable and accrued liabilities   3,000  
Accrued payable for claims to be settled via Parent Cash Pool      
Reorganization, Chapter 11 [Line Items]      
Accounts payable and accrued liabilities   10,000  
Professional fees payable at Emergence      
Reorganization, Chapter 11 [Line Items]      
Accounts payable and accrued liabilities   18,047  
Accrued payable for General Unsecured Claims against Gulfport Parent to be settled via 4A Claims distribution from common shares held in reserve      
Reorganization, Chapter 11 [Line Items]      
Accounts payable and accrued liabilities   23,894  
Accrued payable for General Unsecured Claims against Gulfport Subsidiary to be settled via 4B Claims distribution from common shares held in reserve      
Reorganization, Chapter 11 [Line Items]      
Accounts payable and accrued liabilities   30,216  
Reinstatement of payables due to Plan effects      
Reorganization, Chapter 11 [Line Items]      
Accounts payable and accrued liabilities   45,428  
Reorganization Adjustments      
Reorganization, Chapter 11 [Line Items]      
Accounts payable and accrued liabilities   $ 122,599