Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (123,467)	$ (12,033)	$ 29,547
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Impairment losses	107,763	2,554	40,512
Gain on sale of investment properties, including discontinued operations	(12,013)	(9,164)	(168,784)
Losses on abandoned predevelopment projects	937	829	7,723
Loss (gain) on extinguishment of debt	74	592	(12,498)
Impairment loss on investment in unconsolidated joint ventures	608		51,058
Depreciation and amortization, including discontinued operations	54,061	59,956	55,833
Amortization of deferred financing costs	1,637	2,074	1,473
Stock-based compensation	2,113	2,348	3,743
Effect of certain non-cash adjustments to rental revenues	(6,719)	(5,142)	(4,970)
(Income) loss from unconsolidated joint ventures	17,691	(9,493)	17,639
Operating distributions from unconsolidated joint ventures	8,865	11,394	7,237
Residential lot, outparcel and multi-family cost of sales, net of closing costs paid	5,187	35,743	27,415
Residential lot, outparcel and multi-family acquisition and development expenditures	(999)	(3,272)	(7,283)
Change in deferred income taxes, net of valuation allowance			8,897
Income tax deficiency from stock-based compensation			43
Changes in other operating assets and liabilities:
Change in other receivables and other assets, net	2,099	3,870	(3,537)
Change in accounts payable and accrued liabilities	(2,256)	(560)	(10,884)
Net cash provided by operating activities	55,581	79,696	43,164
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from investment property sales	143,623	101,706	11,727
Property acquisition and development and tenant asset expenditures	(181,909)	(33,761)	(53,874)
Investment in unconsolidated joint ventures	(23,341)	(26,229)	(5,234)
Distributions from unconsolidated joint ventures	8,428	16,024	4,830
Collection of notes receivable, net of investment	747	134	(34)
Change in other assets	(3,002)	(1,363)	(2,812)
Change in restricted cash	10,592	(12,409)	51
Payment of debt guarantee for unconsolidated joint venture		(17,250)
Net cash provided by (used in) investing activities	(44,862)	26,852	(45,346)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from credit facility	256,275	100,300	165,000
Repayment of credit and term facilities	(163,425)	(134,900)	(436,000)
Proceeds from other notes payable		27,034
Repayment of notes payable	(59,543)	(73,133)	(75,819)
Payment of loan issuance costs	(442)	(1,996)
Common stock issued, net of expenses	18	(95)	318,406
Income tax deficiency from stock-based compensation			(43)
Cash common dividends paid	(18,649)	(12,176)	(22,710)
Cash preferred dividends paid	(12,907)	(12,907)	(12,907)
Contributions from noncontrolling interests	1,300	2,237	32
Distributions to noncontrolling interests	(16,087)	(2,777)	(7,276)
Net cash used in financing activities	(13,460)	(108,413)	(71,317)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(2,741)	(1,865)	(73,499)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	7,599	9,464	82,963
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 4,858	$ 7,599	$ 9,464