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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 |

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- Definition Date petition for bankruptcy filed with the bankruptcy court, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=34712771&loc=d3e56145-112766 + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571 + Details
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- Definition Amount of interest payable on debt, including, but not limited to, trade payables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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