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BUSINESS ACQUISITION - Gain on Acquisition (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 0 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Jan. 18, 2012
Bluewater Gandria
Business acquisition:        
Gain on remeasurement       $ 2,356 [1]
Gain on bargain 0 (4,084) 0 (1,933)
Less: Acquisition related costs       (205)
Total gain on acquisition of Bluewater Gandria       $ 4,084
[1] Remeasurement of equity investment in Bluewater Gandria