SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS (Details) (USD $)	3 Months Ended						3 Months Ended			4 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Operating Partnership, as General Partner or Managing Member	Dec. 31, 2012 Operating Partnership, as General Partner or Managing Member	Mar. 31, 2013 Series A Preferred Stock Operating Partnership, as General Partner or Managing Member	Dec. 31, 2012 Series A Preferred Stock Operating Partnership, as General Partner or Managing Member	Mar. 31, 2013 Common stock	Mar. 31, 2013 LTIP Units	Dec. 31, 2012 LTIP Units	May 08, 2013 Subsequent Event Common stock
Noncontrolling Interest [Line Items]
Common stock issued during the period							2,000,000			4,900,000.0
Gross proceeds from issuance of common stock							$ 53,700,000			$ 125,000,000
Proceeds from issuance of common stock	51,840,000	8,029,000					52,900,000			123,100,000
Stock Issue Program, Authorized Amount							$ 150,000,000
Limited partners' common OP units			284,097	284,097	188	188
Share-based compensation, outstanding (in shares)								379,522	168,357