Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
PROPERTIES:
Operating properties, net of accumulated depreciation of $218,123 and $255,128 in 2013 and 2012, respectively	$ 1,822,086	$ 1,828,437
Projects under development, net of accumulated depreciation of $359 and $183 in 2013 and 2012, respectively	34,816	21,681
Land held	34,727	35,053
Total properties	1,891,629	1,885,171
OPERATING PROPERTY AND RELATED ASSETS HELD FOR SALE, net of accumulated depreciation of $2,947 in 2013 and 2012	11,463	24,554
CASH AND CASH EQUIVALENTS	29,080	975
RESTRICTED CASH	3,478	2,810
NOTES AND ACCOUNTS RECEIVABLE, net of allowance for doubtful accounts of $1,734 and $1,743 in 2013 and 2012, respectively	11,456	11,778
DEFERRED RENTS RECEIVABLE	46,963	39,969
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES	107,106	107,082
Intangible assets, net of accumulated amortization of $37,544 and $37,544 in 2014 and 2013, respectively	159,200	170,973
OTHER ASSETS	33,636	29,894
TOTAL ASSETS	2,294,011	2,273,206
LIABILITIES AND EQUITY
NOTES PAYABLE	587,442	630,094
ACCOUNTS PAYABLE AND ACCRUED EXPENSES	55,493	76,668
DEFERRED INCOME	24,781	25,754
Intangible liabilities, net of accumulated amortization of $6,323 and $6,323 in 2014 and 2013, respectively	63,455	66,476
OTHER LIABILITIES	14,682	15,242
TOTAL LIABILITIES	745,853	814,234
STOCKHOLDERS' INVESTMENT:
Preferred stock, 7.50% Series B cumulative redeemable preferred stock, $1 par value, $25 liquidation preference, 20,000,000 shares authorized, 3,791,000 shares issued and outstanding in 2014 and 2013	94,775	94,775
Common stock, $1 par value, 250,000,000 shares authorized, 193,236,454 and 193,236,454 shares issued in 2014 and 2013, respectively	201,993	193,236
Additional paid-in capital	1,510,409	1,420,951
Treasury stock at cost, 3,570,082 shares in 2014 and 2013	(86,840)	(86,840)
Distributions in excess of cumulative net income	(173,752)	(164,721)
TOTAL STOCKHOLDERS’ INVESTMENT	1,546,585	1,457,401
Nonredeemable noncontrolling interests	1,573	1,571
TOTAL EQUITY	1,548,158	1,458,972
TOTAL LIABILITIES AND EQUITY	$ 2,294,011	$ 2,273,206