SUBSEQUENT EVENTS (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	1 Months Ended		3 Months Ended		6 Months Ended		1 Months Ended
	May 31, 2012	Feb. 29, 2012	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Aug. 31, 2012 Quarterly common stock dividend	May 31, 2012 Quarterly common stock dividend	Jul. 31, 2012 Sale of interest Foothills Mall	Jul. 31, 2012 Repayment of debt Foothills Mall	Aug. 31, 2012 Issuance of debt Secured debt item	Aug. 03, 2012 Issuance of debt Secured debt	Jun. 30, 2012 Issuance of debt Secured debt
SUBSEQUENT EVENTS
Proceeds from sale of interest									$ 39.7
Dividends declared per share (in dollars per share)	$ 0.10	$ 0.10	$ 0.10	$ 0.10	$ 0.20	$ 0.20	$ 0.11	$ 0.10
Repayment of debt										36.9
Secured financings											$ 763.5
Weighted average, interest rate (as percent)												5.80%	7.50%
Number of real estate properties											5