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Fresh Start Accounting - Reorganization Adjustments (Detail) - USD ($)
$ in Thousands
Jun. 30, 2021
Apr. 23, 2021
Dec. 31, 2020
Fresh Start Adjustment [Line Items]      
ROU asset $ 44,727   $ 154,796
Finance lease liabilities $ 171,827    
Reorganization Adjustments      
Fresh Start Adjustment [Line Items]      
Reduction in accounts payable   $ 1,000  
Reorganization Adjustments      
Fresh Start Adjustment [Line Items]      
Reduction in accounts payable   (996)  
Reclassification of current BOP operating lease liability to finance lease   17,200  
Adjustment to deferred taxes   3,900  
Reclassification of non-current BOP operating lease liability to finance lease   (90,100)  
Reclassification of non-current BOP operating lease liability to finance lease   90,100  
ASC 842 | Reorganization Adjustments      
Fresh Start Adjustment [Line Items]      
Current BOP finance lease liability   2,100  
Non-current BOP finance lease liability   68,800  
Reorganization Adjustments      
Fresh Start Adjustment [Line Items]      
ROU asset   116,200  
Reorganization Adjustments | ASC 842      
Fresh Start Adjustment [Line Items]      
Finance lease liabilities   $ 66,800