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Schedule of Accrued Expenses (Parenthetical) (Detail) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017 | Mar. 31, 2017
--- | --- | --- | ---
Commissions payable | [1] | $ 2,488 | $ 1,898 |
Accrued interest expense |  | 5,958 | 6,036 |
Post-restructuring capital structure which includes debt |  |  | 448,200 |
Former CEO |  |  |  |
Commissions payable |  |  | 9,600 |
Predecessor |  |  |  |
Commissions payable |  |  |  | $ 2,143
Accrued interest expense |  |  |  | 15,021
Sonatide joint venture |  |  |  |
Commissions payable |  | $ 30,200 | 36,400 |
Accrued interest expense |  |  | $ 36,400 |
Sonatide joint venture | Predecessor |  |  |  |
Accrued interest expense |  |  |  | $ 34,700
[1] | Excludes $30.2 million and $36.4 million of commissions due to Sonatide at June 30, 2018 and December 31, 2017, respectively. These amounts are included in amounts due to affiliates.

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