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Summary of Consolidated Balance Sheet (Parenthetical) (Detail) - USD ($) $ / shares in Units, $ in Thousands |  | 4 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jul. 31, 2017 | Jul. 31, 2017 | Dec. 31, 2017 | Mar. 31, 2017 | Sep. 30, 2013
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Amounts payable to holders of General Unsecured Claims at July 31, 2017 |  | $ 102,193 | $ 102,193 |  |  |
Total payments pursuant to the Plan |  | 225,000 | 225,000 |  |  |
Postconfirmation cash upon full payment |  | 458,700 | 458,700 |  |  |
Aggregate principal amount |  | 350,000 | 350,000 |  |  |
Amount outstanding |  |  |  | $ (448,160) |  |
Warrants issued |  |  |  | 924,125 |  |
Additional paid-in capital |  |  |  | $ 1,059,120 |  |
Reduction in carrying value of receivable related to vessel | [1] | 480 | 480 |  |  |
Decrease in Noncontrolling interests | [2] | $ 13,266 | $ 13,266 |  |  |
Series A Warrants |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Warrants issued |  | 2,400,000 | 2,400,000 |  |  |
Nominal exercise price of warrants |  | $ 57.06 | $ 57.06 |  |  |
Series B Warrants |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Warrants issued |  | 2,600,000 | 2,600,000 |  |  |
Nominal exercise price of warrants |  | $ 62.28 | $ 62.28 |  |  |
Reorganization Adjustments |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Shares issued |  | 18,500,000 |  |  |  |
Reorganization Adjustments | Common stock |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Per share value |  | $ 25 | 25 |  |  |
Reorganization Adjustments | New Creditor Warrant |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Nominal exercise price of warrants |  | $ 25 | $ 25 |  |  |
Reorganization Adjustments | Series A |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Warrants issued |  | 2,400,000 | 2,400,000 |  |  |
Nominal exercise price of warrants |  | $ 2.27 | $ 2.27 |  |  |
Reorganization Adjustments | Series B |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Warrants issued |  | 2,600,000 | 2,600,000 |  |  |
Nominal exercise price of warrants |  | $ 1.88 | $ 1.88 |  |  |
Fresh-start Accounting Adjustments |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Fair value discount rate |  | 12.00% |  |  |  |
Write-off of accrued losses |  | $ 1,300 | $ 1,300 |  |  |
Intangible liability |  | 2,100 | 2,100 |  |  |
Current intangible liability |  | $ 400 | 400 |  |  |
Amortization of intangible liability contract |  | 2023 |  |  |  |
Write-off of deferred rent and unrecognized deferred gain |  | $ 3,800 | 3,800 |  |  |
Write-off of current deferred rent and unrecognized deferred gain |  | 400 | 400 |  |  |
Fresh-start accounting deferred tax current |  | 900 | 900 |  |  |
Fresh-start accounting deferred tax long-term |  | 1,300 | 1,300 |  |  |
Write-off of unamortized debt issuance costs |  | 900 |  |  |  |
Decrease in Noncontrolling interests |  | 13,300 | 13,300 |  |  |
Fresh-start Accounting Adjustments | Reclassification of Construction in Progress to Other Non-Current Assets |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Fresh-start accounting deferred tax |  | 800 | 800 |  |  |
Fresh-start Accounting Adjustments | Reclassification of Construction in Progress to Other Non-Current Assets | United States |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Reduction in carrying value of vessel |  | 41,700 | 41,700 |  |  |
Fresh-start Accounting Adjustments | Reclassification of Construction in Progress to Other Non-Current Assets | Brazil |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Reduction in carrying value of receivable related to vessel |  | 3,800 | 3,800 |  |  |
Carrying value of receivable after fair value adjustment |  | 1,800 | 1,800 |  |  |
September 2013 Senior Unsecured Notes |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Make-whole provision - Senior notes |  |  |  |  |  | $ (500,000)
Senior Notes | Fresh-start Accounting Adjustments | Troms Offshore Supply AS |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Aggregate discount recorded |  | $ 5,400 | 5,400 |  |  |
General Unsecured Creditors | Reorganization Adjustments |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Shares issued |  | 17,000,000 |  |  |  |
General Unsecured Creditors | Reorganization Adjustments | New Creditor Warrant |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Shares issued |  | 7,700,000 |  |  |  |
Unresolved Sale Leaseback Claim | Reorganization Adjustments | New Creditor Warrant |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Shares issued |  | 3,900,000 |  |  |  |
8.00% New Secured Notes Due August 2022 |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Aggregate principal amount |  | $ 350,000 | 350,000 |  |  |
New secured notes |  |  |  | $ 350,000 |  |
8.00% New Secured Notes Due August 2022 | Fresh-start Accounting Adjustments |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
New secured notes |  | 15,400 | 15,400 |  |  |
Premium recorded |  | 350,000 | 350,000 |  |  |
Restatement Adjustment |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Payment made to holders of General Unsecured Claims upon emergence |  | 122,807 | 122,807 |  |  |
Amounts payable to holders of General Unsecured Claims at July 31, 2017 |  | 102,193 | 102,193 |  |  |
Total payments pursuant to the Plan |  | 225,000 | 225,000 |  |  |
Prepaid expenses recognized prior to effective date |  | 12,400 |  |  |  |
Aggregate principal amount |  | 350,000 | 350,000 |  |  |
Accrued interest payable |  | (23,736) | (23,736) |  |  |
Lessor claims - sale leaseback agreements |  | (260,160) | (260,160) |  |  |
Total liabilities subject to compromise |  | (2,326,122) | (2,326,122) |  |  |
Fair value of equity and warrants issued to General Unsecured Creditors |  | 983,482 | 983,482 |  |  |
Gain on settlement of Liabilities subject to compromise |  | (767,640) |  |  |  |
Restatement Adjustment | Term Loan Facility |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Amount outstanding |  | (300,000) | (300,000) |  |  |
Restatement Adjustment | September 2013 Senior Unsecured Notes |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Aggregate debt outstanding |  | (500,000) | (500,000) |  |  |
Restatement Adjustment | August 2011 Senior Unsecured Notes |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Aggregate debt outstanding |  | (165,000) | (165,000) |  |  |
Restatement Adjustment | September 2010 Senior Unsecured Notes |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Aggregate debt outstanding |  | (382,500) | (382,500) |  |  |
Restatement Adjustment | Senior Notes |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Make-whole provision - Senior notes |  | (94,726) | (94,726) |  |  |
Restatement Adjustment | Revolving Credit Facility |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Outstanding borrowing |  | (600,000) | (600,000) |  |  |
Restatement Adjustment | 8.00% New Secured Notes Due August 2022 |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Reclassification from current to long-term |  | 5,200 | 5,200 |  |  |
Aggregate principal amount |  | 350,000 | 350,000 |  |  |
Predecessor |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Reclassification from current to long-term |  | $ 10,409 | 10,409 |  |  |
Amount outstanding |  |  |  |  | $ (2,040,525) |
Gain on settlement of Liabilities subject to compromise |  |  | $ (767,640) |  |  |
Additional paid-in capital |  |  |  |  | 165,221 |
Predecessor | Reorganization Adjustments |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Shares issued |  | 1,500,000 |  |  |  |
Predecessor | Reorganization Adjustments | Series A |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Nominal exercise price of warrants |  | $ 57.06 | $ 57.06 |  |  |
Predecessor | Reorganization Adjustments | Series B |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Nominal exercise price of warrants |  | $ 62.28 | $ 62.28 |  |  |
Predecessor | September 2013 Senior Unsecured Notes |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Aggregate debt outstanding |  |  |  |  | (500,000) |
Predecessor | August 2011 Senior Unsecured Notes |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Aggregate debt outstanding |  |  |  |  | (165,000) |
Predecessor | September 2010 Senior Unsecured Notes |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Aggregate debt outstanding |  |  |  |  | $ (382,500) |
Successor |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Carrying value of receivable after fair value adjustment |  | $ 116,496 | $ 116,496 |  |  |
Successor | Reorganization Adjustments |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Additional paid-in capital |  | 756,346 | 756,346 |  |  |
Fair Value of Successor additional paid-in capital |  | 1,055,391 | 1,055,391 |  |  |
Successor | Reorganization Adjustments | Series A Warrants |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Series A Warrants (2,432,432 Warrants at $1.88 per warrant) |  | 5,510 | 5,510 |  |  |
Successor | Reorganization Adjustments | Series B Warrants |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Series A Warrants (2,432,432 Warrants at $1.88 per warrant) |  | 4,945 | 4,945 |  |  |
Successor | Reorganization Adjustments | Issued Creditor Warrants |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Series A Warrants (2,432,432 Warrants at $1.88 per warrant) |  | 192,108 | 192,108 |  |  |
Successor | Reorganization Adjustments | Reserved Creditor Warrants |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Series A Warrants (2,432,432 Warrants at $1.88 per warrant) |  | $ 96,482 | $ 96,482 |  |  |
Successor | Reorganization Adjustments | Series A |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Warrants issued |  | 2,432,432 | 2,432,432 |  |  |
Nominal exercise price of warrants |  | $ 1.88 | $ 1.88 |  |  |
Successor | Reorganization Adjustments | Series B |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Warrants issued |  | 2,629,657 | 2,629,657 |  |  |
Nominal exercise price of warrants |  | $ 2.27 | $ 2.27 |  |  |
Successor | Reorganization Adjustments | Issued Creditor Warrants |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Warrants issued |  | 7,684,453 | 7,684,453 |  |  |
Nominal exercise price of warrants |  | $ 25 | $ 25 |  |  |
Successor | Reorganization Adjustments | Reserved Creditor Warrants |  |  |  |  |  |
Fresh Start Accounting [Line Items] |  |  |  |  |  |
Warrants issued |  | 3,859,361 | 3,859,361 |  |  |
Nominal exercise price of warrants |  | $ 25 | $ 25 |  |  |
[1] | Represents fair value adjustments on outstanding warranty claims.
[2] | Reflects a $13.3 million adjustment to decrease the carrying value of the noncontrolling interests to the estimated fair value.

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- Definition The amount of capital lease obligations and related accrued interest included in liabilities subject to compromise. + 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=84165509&loc=d3e56145-112766 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6918054&loc=d3e56015-112765 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=64805424&loc=d3e55717-112764 + 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 Amount of receivables, net at the balance sheet date after fresh-start adjustments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6918054&loc=SL2890621-112765 + Details
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