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Restructuring Charges Incurred by Segment and Cost Type (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2015 | Mar. 31, 2015 | Mar. 31, 2016 | Mar. 31, 2015
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring charges | $ 7,600 | $ 4,100 | $ 7,586 | $ 4,052
Americas | Crew Costs |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring charges |  |  | 3,410 |
Americas | Other Vessel Costs |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring charges |  |  | 203 |
Asia/Pacific | Crew Costs |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring charges |  |  | $ 3,973 | 3,697
Corporate | General and Administrative Expenses |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring charges |  |  |  | $ 355

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