SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS (Details) - USD ($)	1 Months Ended	3 Months Ended	6 Months Ended
	Apr. 29, 2016	Jun. 30, 2016	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Noncontrolling Interest [Line Items]
Proceeds from issuance of common stock			$ 141,349,000	$ 21,080,000
Operating Partnership, as General Partner or Managing Member
Noncontrolling Interest [Line Items]
Limited partners' capital account, units issued (in shares)		442,478	442,478
Limited partners' common OP units (in shares)		3,317,760	3,317,760		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		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	141,593
Limited partners' value per unit (in dollars per share)		$ 100.00	$ 100.00
Limited partners' quarterly distribution (in dollars per share)		$ 0.9375
Limited partners' common OP units (in shares)		141,593	141,593	141,593
At The Market Equity Program
Noncontrolling Interest [Line Items]
Common stock, shares authorized not issued, value		$ 200,000,000	$ 200,000,000
At The Market Equity Program | Common stock
Noncontrolling Interest [Line Items]
Common stock issued during the period (in shares)			3,300,000.0
Gross proceeds from issuance of common stock			$ 114,200,000
Proceeds from issuance of common stock			$ 112,700,000
LTIP Units
Noncontrolling Interest [Line Items]
Share-based compensation, outstanding (in shares)		1,045,146	1,045,146		929,169
At The Market Equity Program
Noncontrolling Interest [Line Items]
Common stock, shares authorized not issued, value		$ 200,000,000.0	$ 200,000,000.0
Remaining shares authorized (in shares)		$ 14,400,000	$ 14,400,000
Forward Sale and Underwritten Public Offering | Common stock
Noncontrolling Interest [Line Items]
Common stock issued during the period (in shares)	3,600,000	867,612
Proceeds from issuance of common stock	$ 124,500,000	$ 30,000,000