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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) Integer	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) Integer	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Derivative [Line Items]
Number of interest rate swaps | Integer	6		6
Interest Rate Cash Flow Hedge Assets at Fair Value	$ 141,000		$ 141,000		$ 0
Interest rate cash flow hedge liabilities at fair value	3,942,000		3,942,000		10,752,000
Swap termination value	3,942,000		3,942,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Amount of Income (Loss) Recognized in Other Comprehensive Income on Derivatives	(2,395,000)	$ (2,869,000)	4,768,000	$ (18,572,000)
Amount of (income) loss reclassified from accumulated other comprehensive income into interest expense	1,132,000	$ 1,045,000	2,183,000	$ 958,000
Cash flow hedge amount to be reclassified to Interest Expense in next 12 months	3,636,000		3,636,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivative [Line Items]
Interest Rate Cash Flow Hedge Assets at Fair Value	141,000		141,000		0
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivative [Line Items]
Interest rate cash flow hedge liabilities at fair value	3,942,000		3,942,000		10,752,000
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] | $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] | $100 million interest rate swap (2019) [Domain]
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives	100,000,000		100,000,000		100,000,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | $100 million interest rate swap (2020) [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives	100,000,000		100,000,000		100,000,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | $50 million interest rate swap executed in 2021
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives	$ 50,000,000		$ 50,000,000		$ 0

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