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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2017
USD ($)
Integer
Jun. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
Integer
Jun. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Derivative [Line Items]          
Number of interest rate swaps | Integer 7   7    
Interest Rate Cash Flow Hedge Assets at Fair Value $ 4,293,000   $ 4,293,000   $ 4,546,000
Interest rate cash flow hedge liabilities at fair value 1,890,000   1,890,000   2,578,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]          
Derivative [Line Items]          
Derivative Instruments, Loss Recognized in Other Comprehensive Income(Loss), Effective Portion, Net (1,531,000) $ (4,505,000) (894,000) $ (10,829,000)  
Amount of loss reclassified from accumulated other comprehensive income (loss) into interest expense 547,000 $ 1,043,000 1,320,000 $ 1,970,000  
Cash flow hedge amount to be reclassified to Interest Expense in next 12 months [Line Items] 739,000   739,000    
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]          
Derivative [Line Items]          
Interest Rate Cash Flow Hedge Assets at Fair Value 4,293,000   4,293,000   4,546,000
Interest rate swap cash flow hedge termination value 4,318,000   4,318,000    
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]          
Derivative [Line Items]          
Interest rate cash flow hedge liabilities at fair value 1,890,000   1,890,000   2,578,000
Interest rate swap cash flow hedge termination value 1,925,000   1,925,000    
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | $80 million interest rate swap [Member]          
Derivative [Line Items]          
Notional Amount of Interest Rate Derivatives 80,000,000   80,000,000   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