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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details)
12 Months Ended
Dec. 31, 2020
USD ($)
Integer
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Derivative [Line Items]      
Number of interest rate swaps | Integer 5    
Interest Rate Cash Flow Hedge Assets at Fair Value $ 0 $ 3,485,000  
Interest Rate Cash Flow Hedge Liabilities at Fair Value 10,752,000 678,000  
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]      
Derivative [Line Items]      
Cash flow hedge amount to be reclassified to Interest Expense in next 12 months [Line Items] 4,026,000    
Amount of income (loss) recognized in Other Comprehensive Income (Loss) on derivatives (17,364,000) (1,975,000) $ 2,757,000
Amount of (income) loss reclassified from accumulated other comprehensive income to interest expense 3,805,000 (1,919,000) $ (1,404,000)
Interest Rate Swap [Member] | Other Liabilities [Member] | Designated as Hedging Instrument [Member]      
Derivative [Line Items]      
Termination value, if in default of dervative obligations 10,928,000    
$75 million interest rate swap executed in 2015 [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]      
Derivative [Line Items]      
Derivative, Notional Amount 75,000,000 75,000,000  
$65 million interest rate swap executed in 2016 [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]      
Derivative [Line Items]      
Derivative, Notional Amount 65,000,000 65,000,000  
$60 million interest rate swap [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]      
Derivative [Line Items]      
Derivative, Notional Amount 0 60,000,000  
$40 million interest rate swap (2016) [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]      
Derivative [Line Items]      
Derivative, Notional Amount 40,000,000 40,000,000  
$15 million interest rate swap [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]      
Derivative [Line Items]      
Derivative, Notional Amount 0 15,000,000  
$100 million interest rate swap (2019) [Domain] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]      
Derivative [Line Items]      
Derivative, Notional Amount 100,000,000 100,000,000  
$100 million interest rate swap (2020) | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]      
Derivative [Line Items]      
Derivative, Notional Amount $ 100,000,000 $ 0