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Schedule of Other Liabilities and Deferred Credits (Detail) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017 | Mar. 31, 2017
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Deferred Credits and Other Liabilities [Abstract] |  |  |
Postretirement benefits liability | $ 2,420 | $ 2,642 |
Pension liabilities | 36,526 | 36,614 |
Deferred supplemental savings plan liability | 5,277 | 6,592 |
Other |  | 19,320 |
Other | 13,462 | 12,728 |
Other liabilities and deferred credits | $ 57,685 | $ 58,576 |
Predecessor |  |  |
Deferred Credits and Other Liabilities [Abstract] |  |  |
Postretirement benefits liability |  |  | $ 4,394
Pension liabilities |  |  | 40,339
Deferred gain on vessel sales |  |  | 88,923
Other |  |  | 21,049
Other liabilities and deferred credits |  |  | $ 154,705

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- Definition Deferred supplemental savings plan liability. + References No definition available. + Details
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- Definition Other Liabilities Credits and deferred supplemental saving plan liability, + References No definition available. + Details
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- Definition Noncurrent portion of the defined benefit and defined contribution pension plans, postemployment plans, and Multiemployer Plans, excluding the Postretirement benefits liability. + References No definition available. + Details
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- Definition Amount of liability, recognized in statement of financial position, for defined benefit other postretirement plan, classified as noncurrent. Excludes pension plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(24)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1731-114919 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919 + Details
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