DERIVATIVES - Schedule of Pre-tax Effect of Hedging Derivative Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Interest Expense	$ 6,026	$ 5,690	$ 5,581
Reclassifications Out of Accumulated Other Comprehensive Income/Loss | Gains on derivative instruments: | Interest Rate Contract
Derivative [Line Items]
Interest Expense	(17)	0	$ 0
Designated as Hedging Instrument | Reclassifications Out of Accumulated Other Comprehensive Income/Loss | Gains on derivative instruments: | Interest Rate Contract
Derivative [Line Items]
Interest Expense	17	0
Cash Flow Hedging | Interest Rate Swap
Derivative [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion)	$ 89	$ 989