Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
PROPERTIES:
Operating properties, net of accumulated depreciation of $247,774 and $289,473 in 2012 and 2011, respectively	$ 674,615	$ 884,652
Projects under development	24,668	11,325
Land held	51,217	54,132
Residential lots	11,965	13,195
Other	431	637
Total properties	762,896	963,941
OPERATING PROPERTIES AND RELATED ASSETS HELD FOR SALE, net of accumulated depreciation of $46,936 in 2012	174,054	0
CASH AND CASH EQUIVALENTS	5,469	4,858
RESTRICTED CASH	2,749	4,929
NOTES AND OTHER RECEIVABLES, net of allowance for doubtful accounts of $1,207 and $5,100 in 2012 and 2011, respectively	11,163	11,359
DEFERRED RENTS RECEIVABLE	37,840	37,141
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES	139,782	160,587
OTHER ASSETS	65,148	52,720
TOTAL ASSETS	1,199,101	1,235,535
LIABILITIES AND EQUITY
NOTES PAYABLE	518,630	539,442
ACCOUNTS PAYABLE AND OTHER LIABILITIES	40,073	38,592
DEFERRED INCOME	12,498	17,343
TOTAL LIABILITIES	571,201	595,377
COMMITMENTS AND CONTINGENT LIABILITIES
REDEEMABLE NONCONTROLLING INTERESTS	0	2,763
Preferred stock, 20,000,000 shares authorized, $1 par value:
Common stock, $1 par value, 250,000,000 shares authorized, 107,705,782 and 107,272,078 shares issued in 2012 and 2011, respectively	107,706	107,272
Additional paid-in capital	689,194	687,835
Treasury stock at cost, 3,570,082 shares in 2012 and 2011	(86,840)	(86,840)
Distributions in excess of cumulative net income	(285,508)	(274,177)
TOTAL STOCKHOLDERS' INVESTMENT	594,154	603,692
Nonredeemable noncontrolling interests	33,746	33,703
TOTAL EQUITY	627,900	637,395
TOTAL LIABILITIES AND EQUITY	1,199,101	1,235,535
Series A Preferred Stock [Member]
Preferred stock, 20,000,000 shares authorized, $1 par value:
7.75% Series A cumulative redeemable preferred stock, $25 liquidation preference; 2,993,090 shares issued and outstanding in 2012 and 2011 and 7.50% Series B cumulative redeemable preferred stock, $25 liquidation preference; 3,791,000 shares issued and outstanding in 2012 and 2011	74,827	74,827
Series B Preferred Stock [Member]
Preferred stock, 20,000,000 shares authorized, $1 par value:
7.75% Series A cumulative redeemable preferred stock, $25 liquidation preference; 2,993,090 shares issued and outstanding in 2012 and 2011 and 7.50% Series B cumulative redeemable preferred stock, $25 liquidation preference; 3,791,000 shares issued and outstanding in 2012 and 2011	$ 94,775	$ 94,775