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FAIR VALUE (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Amounts included in:    
Restricted cash $ 8,300 $ 7,900
Recurring Basis    
Assets    
Money Market Funds – Fidelity, US 202 12
Interest bearing deposits – various banks 24,547 19,357
Amounts included in:    
Cash and cash equivalents 18,412 13,326
Restricted cash 741 737
Long-term restricted cash 5,596 5,306
Total 24,749 19,369
Recurring Basis | Level 1    
Assets    
Money Market Funds – Fidelity, US 202 12
Interest bearing deposits – various banks 24,547 19,357
Amounts included in:    
Cash and cash equivalents 18,412 13,326
Restricted cash 741 737
Long-term restricted cash 5,596 5,306
Total 24,749 19,369
Recurring Basis | Level 2    
Assets    
Money Market Funds – Fidelity, US 0 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 – Fidelity, US 0 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