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FAIR VALUE MEASUREMENTS (Details) - Fair Value, Measurements, Recurring [Member] - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2017
Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Investments for contractual obligations   $ 10,518 $ 9,668
Derivative Asset   891 988
Other Assets, Fair Value Disclosure $ 171 171 181
Assets, Fair Value Disclosure   11,580 10,837
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Preferred stock at beginning of period 181    
Preferred stock at end of period 171    
Fair Value, Inputs, Level 1 [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Investments for contractual obligations   10,518 9,668
Derivative Asset   0 0
Other Assets, Fair Value Disclosure 0 0 0
Assets, Fair Value Disclosure   10,518 9,668
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Preferred stock at beginning of period 0    
Preferred stock at end of period 0    
Fair Value, Inputs, Level 2 [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Investments for contractual obligations   0 0
Derivative Asset   891 988
Other Assets, Fair Value Disclosure 0 0 0
Assets, Fair Value Disclosure   891 988
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Preferred stock at beginning of period 0    
Preferred stock at end of period 0    
Fair Value, Inputs, Level 3 [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Investments for contractual obligations   0 0
Derivative Asset   0 0
Other Assets, Fair Value Disclosure 171 171 181
Assets, Fair Value Disclosure   $ 171 $ 181
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Preferred stock at beginning of period 181    
Assets, Fair Value Adjustment (10)    
Preferred stock at end of period $ 171