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VESSELS AND EQUIPMENT, NET (Schedule of Vessels and Equipment) (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Property, Plant and Equipment [Abstract]    
Cost $ 1,488,475 $ 1,360,605
Accumulated depreciation (302,650) (270,989)
Vessels and equipment, net $ 1,185,825 $ 1,089,616