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FAIR VALUE MEASUREMENTS (Details) - Fair Value, Measurements, Recurring [Member] - USD ($)
$ in Thousands
 3 Months Ended
Jun. 30, 2017
Jun. 30, 2017
Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Investments for contractual obligations   $ 11,015 $ 9,668
Derivative Asset   726 988
Other Assets, Fair Value Disclosure $ 144 144 181
Assets, Fair Value Disclosure   11,885 10,837
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Preferred stock at end of period 144    
Fair Value, Inputs, Level 1 [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Investments for contractual obligations   11,015 9,668
Derivative Asset   0 0
Other Assets, Fair Value Disclosure 0 0 0
Assets, Fair Value Disclosure   11,015 9,668
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
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   726 988
Other Assets, Fair Value Disclosure 0 0 0
Assets, Fair Value Disclosure   726 988
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
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 144 144 181
Assets, Fair Value Disclosure   $ 144 $ 181
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Assets, Fair Value Adjustment (37)    
Preferred stock at end of period $ 144