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Schedule of Amounts Due from Affiliate (Detail) - USD ($) $ in Thousands | 3 Months Ended | 4 Months Ended | 5 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2018 | Jul. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2018
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Begining balance |  |  |  |  | $ 230,315
Less impairment of due from affiliate |  | $ (20,083) |  |  | (20,083)
Ending balance |  | 132,951 |  | $ 230,315 | 132,951
Sonatide Marine, Ltd. |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Begining balance |  |  |  | 252,393 | 230,315
Revenue earned by the company through Sonatide |  |  |  | 40,303 | 56,916
Less amounts received from Sonatide |  |  |  | (28,264) | (76,878)
Less amounts used to offset Due to Sonatide obligations | [1] |  |  | (33,607) | (78,993)
Less impairment of due from affiliate |  |  |  |  | (20,083)
Other |  |  |  | (510) | (2,101)
Ending balance |  | $ 109,176 | $ 252,393 | 230,315 | $ 109,176
Predecessor | Sonatide Marine, Ltd. |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Begining balance |  |  | 262,652 | $ 252,393 |
Revenue earned by the company through Sonatide |  |  | 34,397 |  |
Less amounts received from Sonatide |  |  | (21,019) |  |
Less amounts used to offset Due to Sonatide obligations | [1] |  | (21,453) |  |
Other |  |  | (2,184) |  |
Ending balance |  |  | $ 252,393 |  |
[1] | 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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