CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Net cash provided by operating activities:	$ 80,851	$ 79,432
Cash flows from investing activities:
Acquisition of real estate, including intangible assets	23,000	7,395
Investment in real estate under construction	(52,238)	(46,238)
Capital expenditures	16,271	16,739
Net proceeds from sale of properties	72,561	86,843
Principal payments received on loans receivable	1,788	3,549
Investment in loans receivable	(5,829)	(30,535)
Investments in non-consolidated entities	(1,920)	(19,940)
Distributions from non-consolidated entities in excess of accumulated earnings	0	140
Sale of interest in non-consolidated entity	7,000	0
Increase in deferred leasing costs	(3,631)	(9,246)
Change in escrow deposits and restricted cash	4,677	(3,799)
Real estate deposits	(49)	(332)
Net cash used in investing activities	(16,912)	(43,692)
Cash flows from financing activities:
Dividends to common and preferred shareholders	(51,450)	(46,192)
Repurchase of exchangeable notes	(62,150)	0
Principal amortization payments	(19,588)	(20,072)
Principal payments on debt, excluding normal amortization	(139,283)	(61,266)
Change in revolving credit facility borrowings, net	35,000	0
Proceeds from term loan	206,000	0
Increase in deferred financing costs	(4,638)	(4,213)
Change in restricted cash	(4,498)	0
Proceeds of mortgages and notes payable	61,500	15,000
Cash distributions to noncontrolling interests	(33,534)	(3,230)
Contributions from noncontrolling interests	889	0
Repurchase of preferred shares	(70,000)	(657)
Receipts on forward equity commitment, net	0	857
Exercise of employee common share options	0	777
Issuance of common shares, net	4,291	94,761
Net cash used in financing activities	(77,461)	(24,235)
Change in cash and cash equivalents	(13,522)	11,505
Cash and cash equivalents, at beginning of period	63,711	52,644
Cash and cash equivalents, at end of period	$ 50,189	$ 64,149