DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING - Gain or Loss Recognized (Details 2) - Interest rate swaps - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative instruments, gain (loss) recognized
Estimated reclassification from other comprehensive income as an increase to interest expense in 2017	$ 800
Cash flow hedges
Derivative instruments, gain (loss) recognized
Loss recognized in accumulated other comprehensive income on derivative financial instruments (effective portion)	(497)	$ (1,846)	$ (2,112)
Loss recognized in Other Expense (ineffective portion)	0	(1)	(1)
Cash flow hedges | Interest expense
Derivative instruments, gain (loss) recognized
Loss reclassified from accumulated other comprehensive income to interest expense (effective portion)	$ (1,190)	$ (1,927)	$ (1,741)