FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Dec. 31, 2014	Jan. 09, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unsecured notes payable	$ 450,000	$ 450,000	$ 250,000
Fair value of interest rate swap	2,842	2,842	1,448
Fair Value, Inputs, Level 2
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value of interest rate swap	2,842	$ 2,842	$ 1,448
Fair Value, Inputs, Level 2 | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value assumptions, interest rate		3.40%
Fair Value, Inputs, Level 2 | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value assumptions, interest rate		5.50%
Interest Rate Swap
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unrealized gain (loss) on derivatives	(900)	$ (1,400)
Deferred Credits and Other Liabilities | Interest Rate Swap
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value of interest rate swap	$ 2,800	$ 2,800
Amended and Restated Credit Facility
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unsecured notes payable				$ 100,000