DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) Integer	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) Integer	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Derivative [Line Items]
Number of interest rate swaps | Integer	6		6
Interest Rate Cash Flow Hedge Assets at Fair Value	$ 10,693,000		$ 10,693,000		$ 6,034,000
Interest rate cash flow hedge liabilities at fair value	0		0		695,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of Income (Loss) Recognized in Other Comprehensive Income on Derivatives	1,002,000	$ (102,000)	6,236,000	$ (996,000)
Amount of (income) loss reclassified from accumulated other comprehensive income into interest expense	(449,000)	$ 326,000	(891,000)	$ 1,646,000
Cash flow hedge amount to be reclassified to Interest Expense in next 12 months [Line Items]	2,884,000		2,884,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivative [Line Items]
Interest Rate Cash Flow Hedge Assets at Fair Value	10,693,000		10,693,000		6,034,000
Interest rate swap cash flow hedge termination value	10,798,000		10,798,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivative [Line Items]
Interest rate cash flow hedge liabilities at fair value	0		0		695,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | $80 million interest rate swap [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives	0		0		80,000,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | $75 million interest rate swap executed in 2014 [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives	75,000,000		75,000,000		75,000,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | $75 million interest rate swap executed in 2015 [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives	75,000,000		75,000,000		75,000,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | $65 million interest rate swap executed in 2016 [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives	65,000,000		65,000,000		65,000,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | $60 million interest rate swap [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives	60,000,000		60,000,000		60,000,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | $40 million interest rate swap (2016) [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives	40,000,000		40,000,000		40,000,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | $15 million interest rate swap [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives	$ 15,000,000		$ 15,000,000		$ 15,000,000