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Schedule of Amounts Due from Affiliate (Detail) $ in Thousands | 9 Months Ended
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Sep. 30, 2019 USD ($)
Schedule Of Equity Method Investments [Line Items] |  |
Begining balance | $ 132,951 |
Ending balance | 124,757 |
Sonatide Marine, Ltd. |  |
Schedule Of Equity Method Investments [Line Items] |  |
Begining balance | 109,176 |
Revenue earned by the company through Sonatide | 41,184 |
Less amounts received from Sonatide | (45,393) |
Less amounts used to offset Due to Sonatide obligations | (10,551) | [1]
Other | (2,615) |
Ending balance | $ 91,801 |
[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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