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Chapter 11 Proceedings and Emergence - Additional Information (Detail)
$ in Thousands
1 Months Ended 3 Months Ended
Jul. 31, 2017
USD ($)
Vessel
Jun. 30, 2017
USD ($)
Reorganizations [Line Items]    
Prepackaged plan of reorganization, date of written order issued by court   Jul. 17, 2017
Prepackaged plan of reorganization, petition date   May 17, 2017
Prepackaged plan of reorganization, date on emerged from bankruptcy   Jul. 31, 2017
Purchase warrant exercise period   6 years
Liabilities subject to compromise, sale leaseback parties   $ 323,595
Subsequent Event    
Reorganizations [Line Items]    
Number of vessels leased | Vessel 16  
Claims paid in cash $ 225,000  
Percentage of pro forma common equity 95.00%  
Bankruptcy claims, percentage of proforma common equity issued to existing stockholders 5.00%  
Class of warrant or rights exercisable for number of shares, percentage 7.50%  
Liabilities subject to compromise, sale leaseback parties $ 323,600  
Subsequent Event | Maximum | Non-U.S. Citizens    
Reorganizations [Line Items]    
Ownership percentage of common stock 25.00%  
Prepackaged ownership percentage of common stock 22.00%  
Subsequent Event | Minimum | Non-U.S. Citizens    
Reorganizations [Line Items]    
Ownership percentage of common stock 24.00%  
Subsequent Event | Series A Warrants    
Reorganizations [Line Items]    
Aggregate exercise price of warrants $ 1,710,000  
Subsequent Event | Series B Warrants    
Reorganizations [Line Items]    
Aggregate exercise price of warrants $ 2,020,000  
New Secured Notes | Subsequent Event    
Reorganizations [Line Items]    
Debt instrument fixed interest rate 8.00%  
Debt instrument maturity date Dec. 30, 2022  
Aggregate principal amount $ 350,000