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OPERATING LEASES (Details) - USD ($)
$ in Thousands
12 Months Ended
Nov. 29, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Future minimum payments under non-cancellable operating leases:        
2017   $ 23,711    
2018   1,273    
2019   1,130    
2020   1,130    
2021   1,130    
Total minimum lease payments   28,374    
Total rental expense for operating leases   29,600 $ 42,800 $ 600
Vessels leased to third parties        
Minimum contractual future revenues to be received:        
Cost   191,100 47,500  
Accumulated depreciation   416,900 $ 15,200  
Time charters        
Minimum contractual future revenues to be received:        
2016   9,235    
2017 and thereafter   3,618    
Total   $ 12,853    
West Africa Gas Limited [Member]        
Minimum contractual future revenues to be received:        
Time Charter Revenues $ 1,000