Annual report pursuant to Section 13 and 15(d)

FRESH START ACCOUNTING (Reorganization Adjustment to Retained Earnings (Accumulated Deficit)) (Details)

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FRESH START ACCOUNTING (Reorganization Adjustment to Retained Earnings (Accumulated Deficit)) (Details) - USD ($)
$ in Thousands
5 Months Ended 7 Months Ended
May 17, 2021
Dec. 31, 2021
Dec. 31, 2020
Reorganization, Chapter 11 [Line Items]      
Accumulated deficit $ 0 $ (112,829) $ (4,472,859)
Legal and professional advisory fees (81,565) $ 0  
Reorganization Adjustments      
Reorganization, Chapter 11 [Line Items]      
Gain on settlement of liabilities subject to compromise 658,358    
Accumulated deficit 4,805,390    
Legal and professional advisory fees (18,047)    
Extinguishment of Predecessor common stock and paid in capital      
Reorganization, Chapter 11 [Line Items]      
Accumulated deficit 4,221,864    
Recognition of counterparty credits due to settlements effectuated at Emergence      
Reorganization, Chapter 11 [Line Items]      
Accumulated deficit 4,247    
Deferred compensation earned at Emergence      
Reorganization, Chapter 11 [Line Items]      
Accumulated deficit (2,073)    
Extinguishment of Predecessor accumulated other comprehensive income      
Reorganization, Chapter 11 [Line Items]      
Accumulated deficit (40,430)    
Write-off of debt issuance costs related to First-Out Term Loan      
Reorganization, Chapter 11 [Line Items]      
Accumulated deficit (3,150)    
Severance costs incurred as a result of the Plan      
Reorganization, Chapter 11 [Line Items]      
Accumulated deficit (5,961)    
Rights offering backstop commitment fee      
Reorganization, Chapter 11 [Line Items]      
Accumulated deficit (5,000)    
Extinguishment of Predecessor stock-based compensation      
Reorganization, Chapter 11 [Line Items]      
Accumulated deficit $ (4,418)