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Schedule of Other Current Assets (Detail) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017 | Mar. 31, 2017
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Other Current Assets, Properties and Equipment, Other Assets Accrued Expenses Other Current Liabilities and other Non current liabilities and Deferred Credits [Abstract] |  |  |  |
Deposits |  | $ 2,151 | $ 1,780 |
Reorganization related retainer payments |  |  | 50 |
Investments held in rabbi trust | [1] | 45 | 8,908 |
Prepaid expenses |  |  | 8,392 |
Prepaid expenses |  | 8,017 | 8,442 |
Total other current assets |  | $ 10,213 | $ 19,130 |
Predecessor |  |  |  |
Other Current Assets, Properties and Equipment, Other Assets Accrued Expenses Other Current Liabilities and other Non current liabilities and Deferred Credits [Abstract] |  |  |  |
Deposits |  |  |  | $ 3,057
Reorganization related retainer payments |  |  |  | 3,938
Investments held in rabbi trust |  |  |  | 8,759
Prepaid expenses |  |  |  | 11,414
Total other current assets |  |  |  | $ 18,409
[1] | Tidewater converted substantially all investments held in the rabbi trust to cash to fund a lump sum benefit to the former CEO in May 2018. Refer to Note (6) for more information regarding this payment.

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