SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS (Details) (USD $)	6 Months Ended		1 Months Ended		6 Months Ended					6 Months Ended			1 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jul. 31, 2012 At The Market Equity Program	Jun. 30, 2012 At The Market Equity Program	Jun. 30, 2012 At The Market Equity Program	Jun. 30, 2012 Operating Partnership, as General Partner or Managing Member	Dec. 31, 2011 Operating Partnership, as General Partner or Managing Member	Jun. 30, 2012 Series A Preferred Stock Operating Partnership, as General Partner or Managing Member	Dec. 31, 2011 Series A Preferred Stock Operating Partnership, as General Partner or Managing Member	Jun. 30, 2012 Common stock At The Market Equity Program	Jun. 30, 2012 LTIP Units	Dec. 31, 2011 LTIP Units	Jan. 31, 2012 Maximum Common stock
Noncontrolling Interest [Line Items]
Common Stock, Reserved for Future Issuance, Value, At The Market Equity Program													$ 75,000,000
Stock Issued During Period, Shares, New Issues (in shares)										2,900,000
Gross Proceeds from Issuance of Common Stock					65,700,000
Proceeds from Issuance of Common Stock	$ 60,717,000	$ 0	$ 3,600,000	$ 61,000,000	$ 64,600,000
Limited Partners' Capital Account, Units Outstanding (in shares)						384,376	279,748	188	188
Share-based Compensation, Units Outstanding (in shares)											237,000	217,826