DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($) Integer	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) Integer	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Derivative [Line Items]
Number of interest rate swaps | Integer	7		7
Interest Rate Cash Flow Hedge Assets at Fair Value	$ 0		$ 0		$ 400,000
Interest rate cash flow hedge liabilities at fair value	12,403,000		12,403,000		3,960,000
Eighty Million Unsecured Term Loan [Member]
Derivative [Line Items]
Term Loan Notional Amount Associated with Interest Rate Swap Derivative					80,000,000
Seventy-five Million Unsecured Term Loan [Member]
Derivative [Line Items]
Term Loan Notional Amount Associated with Interest Rate Swap Derivative					75,000,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Instruments, Loss Recognized in Other Comprehensive Loss, Effective Portion, Net	(4,505,000)	$ 2,006,000	(10,829,000)	$ (1,462,000)
Amount of income (loss) reclassified from accumulated other comprehensive loss into interest expense	(1,043,000)	$ (1,116,000)	(1,970,000)	$ (2,049,000)
Cash flow hedge amount to be reclassified to Interest Expense in next 12 months [Line Items]	4,266,000		4,266,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivative [Line Items]
Interest Rate Cash Flow Hedge Assets at Fair Value	0		0		400,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivative [Line Items]
Interest rate cash flow hedge liabilities at fair value	12,403,000		12,403,000		3,960,000
Interest rate swap cash flow hedge termination value	12,850,000		12,850,000
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		0
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		0
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