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Capital Lease Obligations - Capital Lease Obligations (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Capital Leased Assets [Line Items]    
Less current portion $ (4,546) $ (4,422)
Long-term portion 54,581 59,128
Suezmax Tankers [Member]    
Capital Leased Assets [Line Items]    
Capital Lease Obligations $ 59,127 $ 63,550