FAIR VALUE MEASUREMENTS (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments for contractual obligations		$ 11,494	$ 9,668
Derivative Asset		566	988
Other Assets, Fair Value Disclosure	$ 145	145	181
Assets, Fair Value Disclosure		12,205	10,837
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Preferred stock at end of period	145
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments for contractual obligations		11,494	9,668
Derivative Asset		0	0
Other Assets, Fair Value Disclosure	0	0	0
Assets, Fair Value Disclosure		11,494	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		566	988
Other Assets, Fair Value Disclosure	0	0	0
Assets, Fair Value Disclosure		566	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	145	145	181
Assets, Fair Value Disclosure		$ 145	$ 181
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, Fair Value Adjustment	(36)
Preferred stock at end of period	$ 145