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Segment Information, Geographical Data and Major Customers (Parenthetical) (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2015
Segment Reporting Information [Line Items] |  |  |  |
General and administrative expenses |  | $ 145,879 | $ 153,811 | $ 189,819
Corporate Vessels |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Construction costs |  | 52,400 | 136,800 | 235,200
Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
General and administrative expenses | [1] | 55,389 | $ 34,078 | $ 40,621
Corporate | Troms Offshore Supply AS |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
General and administrative expenses |  | $ 29,000 |  |
[1] | Corporate general and administrative expenses in fiscal 2017 include $29 million associated with our efforts to renegotiate the terms of various debt arrangements and related consulting services.

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- Definition The aggregate costs related to construction and development services during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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