DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details)	3 Months Ended			9 Months Ended
	Sep. 30, 2015 USD ($) Integer	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2015 USD ($) Integer	Sep. 30, 2014 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2012 USD ($)
Derivative [Line Items]
Number of interest rate swaps | Integer	5			5
Interest Rate Cash Flow Hedge Assets at Fair Value	$ 0			$ 0			$ 812,000
Interest rate cash flow hedge liabilities at fair value	7,029,000			7,029,000			3,314,000
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative Instruments, Income (Loss) Recognized in Other Comprehensive Loss, Effective Portion, Net	(6,261,000)	$ 287,000		(7,723,000)	$ (3,635,000)
Amount of loss reclassified from accumulated other comprehensive loss into interest expense	(1,121,000)	(776,000)		(3,170,000)	(1,921,000)
Cash flow hedge amount to be reclassified to Interest Expense in next 12 months [Line Items]	3,828,000			3,828,000
Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Interest Rate Cash Flow Hedge Assets at Fair Value	0			0			812,000
Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Interest rate cash flow hedge liabilities at fair value	7,029,000			7,029,000			3,314,000
Interest rate swap cash flow hedge termination value	7,149,000			7,149,000
$80 million interest rate swap [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives	80,000,000			80,000,000			80,000,000	$ 80,000,000
$75 million interest rate swap executed in 2014 [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives	75,000,000	75,000,000		75,000,000	75,000,000		75,000,000
Eighty Million Unsecured Term Loan [Member]
Derivative [Line Items]
Term Loan Notional Amount Associated with Interest Rate Swap Derivative							80,000,000	$ 80,000,000
$60 million interest rate swap [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives	60,000,000			60,000,000			60,000,000
$15 million interest rate swap [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives	15,000,000			15,000,000			15,000,000
Seventy-five Million Unsecured Term Loan [Member]
Derivative [Line Items]
Term Loan Notional Amount Associated with Interest Rate Swap Derivative							75,000,000
$75 million interest rate swaps [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives			$ 75,000,000
Number of interest rate swaps entered into during period			2
Seventy-Five Million Unsecured Term Loan executed in 2014 [Member]
Derivative [Line Items]
Term Loan Notional Amount Associated with Interest Rate Swap Derivative		$ 75,000,000			$ 75,000,000
$75 million interest rate swap executed in 2015 [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives	$ 75,000,000			$ 75,000,000			$ 0
Seventy-Five Million Unsecured Term Loan executed in 2015 [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivatives						$ 75,000,000
Term Loan Notional Amount Associated with Interest Rate Swap Derivative						$ 75,000,000