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Reorganization and Chapter 11 Proceedings - Additional Information (Detail)
1 Months Ended 12 Months Ended
May 17, 2017
USD ($)
Jun. 21, 2013
Jul. 31, 2017
USD ($)
Mar. 31, 2006
USD ($)
Mar. 31, 2017
USD ($)
Tranche
Mar. 31, 2006
USD ($)
May 11, 2017
USD ($)
Jun. 30, 2016
Mar. 31, 2016
USD ($)
May 31, 2015
USD ($)
Reorganizations [Line Items]                    
Borrowing during the period           $ 600,000,000        
Debt outstanding         $ 2,040,525,000       $ 2,052,270,000  
Deferred debt issuance costs         6,401,000       6,754,000  
Current portion of long-term debt         $ 2,034,124,000       2,045,516,000  
Withdrawal from Credit Facility       $ 600,000,000            
Percentage of outstanding principal amount   99.00%                
Petition date         May 17, 2017          
Purchase warrant exercise period         6 years          
Combined vessel operating lease expense and interest and debt costs net         $ 108,800,000          
Scenario Forecast                    
Reorganizations [Line Items]                    
Claims paid in cash     $ 225,000,000              
Percentage of pro forma common equity     95.00%              
Bankruptcy claims, percentage of proforma common equity issued to existing stockholders     500.00%              
Class of warrant or rights exercisable for number of shares, percentage     750.00%              
Expected elimination in principal amount of outstanding debt     $ 1,600,000,000              
Annual reduction of interest and operating lease expenses     73,000,000              
Scenario Forecast | Series A Warrants                    
Reorganizations [Line Items]                    
Aggregate exercise price of warrants     1,710,000,000              
Scenario Forecast | Series B Warrants                    
Reorganizations [Line Items]                    
Aggregate exercise price of warrants     $ 2,020,000,000              
Subsequent Event                    
Reorganizations [Line Items]                    
Debt outstanding $ 2,040,000,000                  
Percentage of outstanding principal amount             60.00%      
Accrued interest payable on our credit facility and notes 23,700,000                  
Reserve for the Sale Leaseback Claims $ 324,000,000                  
3.90% Senior Notes 2010-Series B Due December 30, 2017                    
Reorganizations [Line Items]                    
Debt instrument interest rate   3.90%                
Debt instrument maturity date   Dec. 30, 2017                
3.95% Senior Notes 2010-Series C Due December 30, 2017                    
Reorganizations [Line Items]                    
Debt instrument interest rate   3.95%                
Debt instrument maturity date   Dec. 30, 2017                
4.12% Senior Notes 2010-Series D Due December 30, 2018                    
Reorganizations [Line Items]                    
Debt instrument interest rate   4.12%                
Debt instrument maturity date   Dec. 30, 2018                
4.17% Senior Notes 2010-Series E Due December 30, 2018                    
Reorganizations [Line Items]                    
Debt instrument interest rate   4.17%                
Debt instrument maturity date   Dec. 30, 2018                
4.33% Senior Notes 2010-Series F Due December 30, 2019                    
Reorganizations [Line Items]                    
Debt instrument interest rate   4.33%                
Debt instrument maturity date   Dec. 30, 2019                
4.51% Senior Notes 2010-Series G Due December 30, 2020                    
Reorganizations [Line Items]                    
Debt instrument interest rate   4.51%                
Debt instrument maturity date   Dec. 30, 2020                
4.56% Senior Notes 2010-Series H Due December 30, 2020                    
Reorganizations [Line Items]                    
Debt instrument interest rate   4.56%                
Debt instrument maturity date   Dec. 30, 2020                
4.61% Senior Notes 2010-Series I Due December 30, 2022                    
Reorganizations [Line Items]                    
Debt instrument interest rate   4.61%                
Debt instrument maturity date   Dec. 30, 2022                
4.06% Senior Notes Series 2011-A Due March 31, 2019                    
Reorganizations [Line Items]                    
Debt instrument interest rate   4.06%                
Debt instrument maturity date   Mar. 31, 2019                
4.64% Senior Notes Series 2011-B Due June 30, 2021                    
Reorganizations [Line Items]                    
Debt instrument interest rate   4.64%                
Debt instrument maturity date   Jun. 30, 2021                
4.54% Senior Notes Series 2011-C Due June 30, 2021                    
Reorganizations [Line Items]                    
Debt instrument interest rate   4.54%                
Debt instrument maturity date   Jun. 30, 2021                
4.26% Senior Notes Series 2013-A Due November 16, 2020                    
Reorganizations [Line Items]                    
Debt instrument interest rate   4.26%                
Debt instrument maturity date   Nov. 16, 2020                
5.01% Senior Notes Series 2013-B Due November 15, 2023                    
Reorganizations [Line Items]                    
Debt instrument interest rate   5.01%                
Debt instrument maturity date   Nov. 15, 2023                
5.16% Senior Notes Series 2013-C Due November 17, 2025                    
Reorganizations [Line Items]                    
Debt instrument interest rate   5.16%                
Debt instrument maturity date   Nov. 17, 2025                
New Secured Notes | Scenario Forecast                    
Reorganizations [Line Items]                    
Debt instrument maturity date     Dec. 30, 2022              
Debt instrument fixed interest rate     8.00%              
Aggregate principal amount     $ 350,000,000              
Minimum                    
Reorganizations [Line Items]                    
Increased current and projected liquidity       $ 200,000,000            
Interest coverage ratio         300.00%     300.00%    
Minimum | Scenario Forecast | Non-U.S. Citizens                    
Reorganizations [Line Items]                    
Ownership percentage of common stock     24.00%              
Maximum | Scenario Forecast | Non-U.S. Citizens                    
Reorganizations [Line Items]                    
Ownership percentage of common stock     25.00%              
Prepackaged ownership percentage of common stock     22.00%              
Troms Offshore Supply AS                    
Reorganizations [Line Items]                    
Debt instrument outstanding amount         $ 92,000,000          
Number of tranches of unsecured debt | Tranche         4          
Troms Offshore Supply AS | Subsequent Event                    
Reorganizations [Line Items]                    
Revolving credit facility             $ 5,068,863      
Troms Offshore Supply AS | Minimum                    
Reorganizations [Line Items]                    
Interest coverage ratio         300.00%          
Current Bank Loan Agreement                    
Reorganizations [Line Items]                    
Revolving credit facility         $ 900,000,000         $ 900,000,000
Current Bank Loan Agreement | Revolving Credit Agreement                    
Reorganizations [Line Items]                    
Revolving line of credit         600,000,000          
Current Bank Loan Agreement | Term Loan Facility                    
Reorganizations [Line Items]                    
Revolving line of credit         300,000,000          
September 2013 Senior Unsecured Notes                    
Reorganizations [Line Items]                    
Debt, principal amount         $ 500,000,000       500,000,000  
September 2013 Senior Unsecured Notes | Minimum                    
Reorganizations [Line Items]                    
Interest coverage ratio         300.00%          
August 2011 Senior Unsecured Notes                    
Reorganizations [Line Items]                    
Debt, principal amount         $ 165,000,000       165,000,000  
September 2010 Senior Unsecured Notes                    
Reorganizations [Line Items]                    
Debt, principal amount         $ 382,500,000       $ 382,500,000