DERIVATIVE INSTRUMENTS (Effect of Derivative Instruments Designated Cash Flow Hedges on Statements of Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance in AOCI Beginning of Year	$ 0	$ (898)
Amount of Gain (Loss) Recognized in AOCI- (Effective Portion)	1,871	(25)
Amount of Gain (Loss) Reclassified from AOCI into Earnings-(Effective Portion)	0	(923)
Balance in AOCI End of Year	1,871	0
Interest (expense) | Interest rate swap
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance in AOCI Beginning of Year	0	(898)
Amount of Gain (Loss) Recognized in AOCI- (Effective Portion)	1,871	(25)
Amount of Gain (Loss) Reclassified from AOCI into Earnings-(Effective Portion)	0	(923)
Balance in AOCI End of Year	$ 1,871	$ 0