SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS (Details) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Noncontrolling Interest [Line Items]
Proceeds from issuance of common stock	$ 32,026,000	$ 18,605,000
Operating Partnership, as General Partner or Managing Member
Noncontrolling Interest [Line Items]
Limited partners' capital account, units issued (in shares)	442,478
Limited partners' common OP units (in shares)	3,357,760		2,931,198
Series A Preferred Stock | Operating Partnership, as General Partner or Managing Member
Noncontrolling Interest [Line Items]
Limited partners' common OP units (in shares)	188		188
Series C Preferred Stock | Operating Partnership, as General Partner or Managing Member
Noncontrolling Interest [Line Items]
Limited partners' capital account, units issued (in shares)	141,593
Limited partners' value per unit (in dollars per share)	$ 100.00
Limited partners' quarterly distribution, per unit	$ 0.9375
Limited partners' common OP units (in shares)	141,593
At The Market Equity Program | Common stock
Noncontrolling Interest [Line Items]
Common stock issued during the period (in shares)	1,100,000.0
Gross proceeds from issuance of common stock	$ 35,700,000
Proceeds from issuance of common stock	$ 35,200,000
LTIP Units
Noncontrolling Interest [Line Items]
Share-based compensation, outstanding (in shares)	1,069,813		929,169
At The Market Equity Program
Noncontrolling Interest [Line Items]
Common stock, shares authorized not issued, value	$ 91,600,000			$ 200,000,000.0