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Schedule of Amounts Due to Affiliate (Detail) - USD ($) $ in Thousands | 4 Months Ended | 5 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jul. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2019 | Dec. 31, 2018
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Beginning balance |  |  |  | $ 34,972 |
Ending balance |  |  |  | 50,186 | $ 34,972
Sonatide Marine, Ltd. |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Beginning balance |  | $ 132,857 | $ 123,899 | 29,347 | 99,448
Plus commissions payable to Sonatide |  | 3,330 | 3,928 | 4,937 | 5,502
Plus amounts paid by Sonatide on behalf of the company |  | 9,458 | 12,044 | 9,654 | 14,778
Less commissions paid to Sonatide |  |  | (5,023) | (5,961) | (13,906)
Less amounts used to offset Due from Sonatide obligations | [1] | (21,453) | (33,607) | (10,551) | (78,993)
Other |  | (293) | (1,793) | 4,049 | 2,518
Ending balance |  | $ 123,899 | $ 99,448 | $ 31,475 | $ 29,347
[1] |
| (A) | We reduced the respective due from affiliates and due to affiliates balances each period through netting transactions based on agreement with the joint venture.

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- Definition Commissions paid to affiliates. + References No definition available. + Details
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- Definition Due to affiliates commissions to be paid. + References No definition available. + Details
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- Definition Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 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(19)(a)(5)) -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 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(k)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(12)(b)(3)) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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