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FAIR VALUE (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Amounts included in:    
Restricted cash $ 8,800 $ 9,100
Recurring Basis    
Assets    
Money Market Funds – JPMorgan Chase, US 852  
Interest bearing deposits – various banks 7,508 23,695
Amounts included in:    
Cash and cash equivalents 1,564 16,651
Restricted cash 741 741
Long-term restricted cash 6,055 6,303
Total 8,360 23,695
Recurring Basis | Level 1    
Assets    
Money Market Funds – JPMorgan Chase, US 852  
Interest bearing deposits – various banks 7,508 23,695
Amounts included in:    
Cash and cash equivalents 1,564 16,651
Restricted cash 741 741
Long-term restricted cash 6,055 6,303
Total 8,360 23,695
Recurring Basis | Level 2    
Assets    
Money Market Funds – JPMorgan Chase, US 0  
Interest bearing deposits – various banks 0 0
Amounts included in:    
Cash and cash equivalents 0 0
Restricted cash 0 0
Long-term restricted cash 0 0
Total 0 0
Recurring Basis | Level 3    
Assets    
Money Market Funds – JPMorgan Chase, US 0  
Interest bearing deposits – various banks 0 0
Amounts included in:    
Cash and cash equivalents 0 0
Restricted cash 0 0
Long-term restricted cash 0 0
Total $ 0 $ 0