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Emergence from Voluntary Reorganization under Chapter 11 (Narrative) (Details) - USD ($)
$ in Thousands
Oct. 13, 2021
Dec. 31, 2021
Feb. 02, 2021
Fresh Start Adjustment 1 [Line Items]      
Bankruptcy Claims, Amount of Claims Filed $ 1,700,000    
Bankruptcy Claims, Amount of Claims Expunged by Bankruptcy Court 1,400,000    
Stated interest rate   7.125%  
Amount of Principal   2.00%  
Debtor Reorganization Items Percent Of Stock   100.00%  
Common Class A [Member]      
Fresh Start Adjustment 1 [Line Items]      
Rights outstanding   735,189  
Class 6 General Unsecured Claims [Member]      
Fresh Start Adjustment 1 [Line Items]      
Debtor-in-Possession Financing, Pro Rata Share $ 125,000    
New Senior Unsecured Notes Due 2021 [Member]      
Fresh Start Adjustment 1 [Line Items]      
Stated interest rate   7.125% 7.125%
Senior Unsecured Notes Due 2024 [Member]      
Fresh Start Adjustment 1 [Line Items]      
Stated interest rate   7.75% 7.75%
7.125% Senior Notes [Member]      
Fresh Start Adjustment 1 [Line Items]      
Stated interest rate   7.125%  
7.750% Senior Notes [Member]      
Fresh Start Adjustment 1 [Line Items]      
Stated interest rate   7.75%