EQUITY (Details) (USD $)	3 Months Ended		0 Months Ended	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	May 06, 2013 At The Market Equity Program Agent	Mar. 31, 2014 At The Market Equity Program	Mar. 31, 2014 Commissions At The Market Equity Program	Mar. 31, 2014 Other Offering Costs At The Market Equity Program	Mar. 31, 2014 Performance Based Restricted Stock Equity Incentive Award Plan 2011	Mar. 31, 2014 Restricted Stock Units (RSUs)
Equity [Line Items]
Number of sales agents			4
Aggregate offering price of common share			$ 150,000,000.0
Common shares issued (in shares)				1,435,215
Weighted average price per share issued				$ 33.06
Proceeds from issuance of common stock, net	46,926,000	0		47,400,000
Payments of stock issuance costs					400,000	100,000
Remaining capacity to issue				76,600,000
Noncontrolling common units	17,905,257
Percentage of ownership interests classified as noncontrolling	30.10%
Conversion of operating partnership units (in shares)	11,852
Shares of restricted stock awarded							112,119	112,119
Noncash compensation expense	500,000	700,000
Unrecognized compensation expense	$ 4,400,000
Weighted average unvested shares outstanding	406,856	631,199