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Acquisitions - Summary of Preliminary and Final Fair Values of Assets Acquired and Liabilities Assumed, Including VIE (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 0 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Nov. 30, 2011
Sevan Marine [Member]
Nov. 30, 2011
Sevan Marine [Member]
Voyageur Spirit [Member]
Business Acquisition [Line Items]          
Cash and cash equivalents         $ 50,230
Other current assets         29,209
Vessels and equipment         892,352
Deferred income taxes         3,307
Investment in Sevan Marine       25,000 37,100
Other assets - long-term         659
Total assets acquired         1,012,857
Current liabilities         41,376
In-process revenue contracts         158,968
Long-term debt (note 8)         220,497
Other long-term liabilities 139,676 180,964     6,036
Non-controlling interest         144,600
Total liabilities assumed         571,477
Net assets acquired 279,300       441,380
Bargain purchase gain 0 0 (68,535)   (68,535)
Cash consideration         $ 372,845