CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Net cash provided by operating activities:	$ 118,842	$ 112,880
Cash flows from investing activities:
Investment in real estate, including intangible assets	(97,183)	(26,012)
Net proceeds from sale of properties	101,971	71,572
Principal payments received on loans receivable	27,003	3,767
Investment in loans receivable	(32,553)	(37,564)
Investments in and advances to non-consolidated entities	(19,940)	(2,610)
Distributions from non-consolidated entities in excess of accumulated earnings	140	1,356
Increase in deferred leasing costs	(10,999)	(3,183)
Change in escrow deposits and restricted cash	(4,508)	(11,647)
Real estate deposits	(410)	(1,138)
Net cash used in investing activities	(36,479)	(5,459)
Cash flows from financing activities:
Dividends to common and preferred shareholders	(70,512)	(57,601)
Repurchase of exchangeable notes	0	(25,493)
Proceeds from convertible notes	0	115,000
Principal amortization payments	(26,146)	(27,844)
Principal payments on debt, excluding normal amortization	(70,956)	(243,792)
Change in revolving credit facility borrowing, net	0	11,772
Increase in deferred financing costs	(4,214)	(5,615)
Proceeds of mortgages and notes payable	15,000	59,769
Contributions from noncontrolling interests	0	883
Cash distributions to noncontrolling interests	(3,906)	(7,617)
Repurchase of preferred shares	(1,431)	0
Receipts on forward equity commitment, net	1,285	1,107
Exercise of employee common share options	777	0
Issuance of common shares, net	90,505	70,698
Direct share purchase plan proceeds	6,090	6,724
Net cash used in financing activities	(63,508)	(102,009)
Change in cash and cash equivalents	18,855	5,412
Cash and cash equivalents, at beginning of period	52,644	53,865
Cash and cash equivalents, at end of period	$ 71,499	$ 59,277