Consolidated Statements Of Cash Flows (USD $)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flow from operating activities:
Net loss	$ (105,087,000)	$ (8,198,000)
Adjustments to reconcile net loss to net cash provided by operating activities:
Equity in income of unconsolidated joint ventures	(1,152,000)	(547,000)
Distributions from unconsolidated joint ventures	865,000	759,000
Write-off of investment in unconsolidated joint venture	7,961,000
Impairment charges	7,419,000	2,272,000
Acquisition transaction costs and terminated projects	1,169,000	1,322,000
Impairments charges - discontinued operations	87,287,000	3,276,000
Gain on sales of real estate	(632,000)	(170,000)
Straight-line rents	(1,266,000)	(1,622,000)
Provision for doubtful accounts	2,572,000	2,484,000
Depreciation and amortization	32,917,000	35,644,000
Amortization of intangible lease liabilities	(5,055,000)	(7,478,000)
Amortization (including accelerated write-off) and market price adjustments relating to stock-based compensation	3,907,000	2,068,000
Amortization (including accelerated write-off) of deferred financing costs	3,212,000	6,620,000
Increases/decreases in operating assets and liabilities:
Rents and other receivables, net	(5,066,000)	(4,518,000)
Joint venture settlements	(377,000)	(3,383,000)
Prepaid expenses and other	(5,843,000)	(6,935,000)
Accounts payable and accrued expenses	(1,464,000)	(1,349,000)
Net cash provided by operating activities	21,367,000	20,245,000
Cash flow from investing activities:
Expenditures for real estate and improvements	(76,064,000)	(20,874,000)
Net proceeds from sales of real estate	11,708,000	2,056,000
Net proceeds from transfers to unconsolidated Cedar/RioCan joint venture, less cash at dates of transfer	4,787,000	31,395,000
Investments in and advances to unconsolidated joint ventures	(4,185,000)	(30,396,000)
Distributions of capital from unconsolidated joint ventures	3,990,000	7,725,000
Increase in loans and other receivables	(4,647,000)
Construction escrows and other	(2,661,000)	4,632,000
Net cash used in investing activities	(67,072,000)	(5,462,000)
Cash flow from financing activities:
Net advances/(repayments) from/(to) revolving credit facilities	33,720,000	(131,239,000)
Proceeds from mortgage financings	45,791,000	16,272,000
Mortgage repayments	(9,255,000)	(18,594,000)
Payments of debt financing costs		(1,141,000)
Termination payment related to interest rate swaps		(5,476,000)
Noncontrolling interests:
Contribution from consolidated joint venture minority interests	268,000
Distributions to consolidated joint venture minority interests	(2,193,000)	(2,186,000)
Redemptions of Operating Partnership Units		(2,834,000)
Distributions to limited partners	(386,000)	(526,000)
Net proceeds from the sales of common stock	4,313,000	138,296,000
Exercise of warrant		10,000,000
Preferred stock distributions	(10,650,000)	(5,907,000)
Distributions to common shareholders	(18,427,000)	(16,470,000)
Net cash provided by (used in) financing activities	43,181,000	(19,805,000)
Net (decrease) in cash and cash equivalents	(2,524,000)	(5,022,000)
Cash and cash equivalents at beginning of period	14,166,000	17,164,000
Cash and cash equivalents at end of period	$ 11,642,000	$ 12,142,000