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Comparison of Total Assets (Parenthetical) (Detail) - USD ($) $ in Millions | 3 Months Ended
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Jun. 30, 2016 | Mar. 31, 2016
Corporate Vessels |  |
Segment and Geographic Distribution of Operations [Line Items] |  |
Construction costs | $ 123.7 | $ 136.8

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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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