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Commitments and Contingencies (Brazilian Customs) - Additional Information (Detail) BRL in Millions, $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
May 31, 2016 BRL | Apr. 30, 2011 BRL Vessel | Mar. 31, 2017 USD ($) | Mar. 31, 2017 BRL
Commitments And Contingencies Disclosure [Abstract] |  |  |  |
Fines assessed |  | BRL 155 | $ 49.6 |
Number of Tidewater vessels that the subsidiaries failed to obtain import licenses from | Vessel |  | 17 |  |
Fines assessed | BRL 3 |  | 1.0 |
Deposit Amount |  |  | 1.9 | BRL 6
Amount of fines contested |  |  | 9.6 | 30
Remaining amount of fines contested |  |  | $ 39.1 | 122
Original fine amount | BRL |  |  |  | BRL 155

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- Definition Number of vessels that subsidiaries failed to obtain import licenses. + References No definition available. + Details
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- Definition Remaining fine resolved in entity favor amount. + References No definition available. + Details
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