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Summary of Components Included in Reorganization Items (Detail) - USD ($) $ in Thousands | 1 Months Ended | 2 Months Ended | 4 Months Ended
--- | --- | --- | ---
Jul. 31, 2017 | Sep. 30, 2017 | Jul. 31, 2017
Reorganizations [Line Items] |  |  |  |
Debt, sale leaseback and other reorganization items |  |  | $ 1,244 |
Reorganization-related professional fees |  |  | 636 |
(Gain) loss on reorganization items | [1] |  | $ 1,880 |
Predecessor |  |  |  |
Reorganizations [Line Items] |  |  |  |
Gain on settlement of Liabilities subject to compromise |  | $ (767,640) |  | $ (767,640)
Fresh start adjustments |  | 1,820,018 |  | 1,820,018
Debt, sale leaseback and other reorganization items |  | 8,493 |  | 316,504
Reorganization-related professional fees |  | 22,858 |  | 28,023
(Gain) loss on reorganization items | [1] | $ 1,083,729 |  | $ 1,396,905
[1] | Refer to Note (4) for additional information regarding reorganization items.

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- Definition Amount of reorganization items related to legal and advisory professional fees related to entities in bankruptcy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=64805424&loc=d3e55730-112764 Reference 2: 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 + Details
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- Definition Amount recognized from the revaluation of assets and liabilities. + 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 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=64805424&loc=d3e55730-112764 + Details
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