Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010
Cash flows from operating activities
Net income	$ 9,897		$ 11,861
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization, including discontinued operations	136,733		129,419
Gain on sale of properties, including land	(4,748)		(236)
Gain on sale of unconsolidated joint venture interests	(1,136)
Gain on sale of available-for sale investment	(4,301)
Loss on discontinuation of hedging relationship	29,791
Distributions of income from joint ventures	3,673		3,870
Equity in (income) loss of joint ventures	166	[1]	785	[1]
Share-based compensation	9,254		8,502
Amortization of deferred financing costs	4,761		2,624
Net change in operating accounts and other	16,707		21,636
Net cash from operating activities	200,797		178,461
Cash flows from investing activities
Development and capital improvements	(155,077)		(43,927)
Proceeds from sale of joint venture interests	19,310
Proceeds from sale of properties, including land	19,095		937
Proceeds from sale of available-for-sale investment	4,510
Decrease in notes receivable - affiliates	3,279		537
Investments in joint ventures	(35,280)		(5,094)
Distributions of investments from joint ventures	2,453		28
Other	(4,464)		(2,540)
Net cash from investing activities	(146,174)		(50,059)
Cash flows from financing activities
Borrowings on unsecured line of credit			37,000
Repayments on unsecured line of credit			(37,000)
Repayment of notes payable	(626,432)		(192,247)
Proceeds from notes payable	495,705		57,601
Proceeds from issuance of common shares	69,863		134,617
Distributions to common shareholders, perpetual preferred units and noncontrolling interests	(112,932)		(101,052)
Payment of deferred financing costs	(8,776)		(6,528)
Common share options exercised	11,267		1,132
Net decrease in accounts receivable - affiliates	500		3,843
Other	1,706		1,147
Net cash from financing activities	(169,099)		(101,487)
Net increase (decrease) in cash and cash equivalents	(114,476)		26,915
Cash and cash equivalents, beginning of period	170,575		64,156
Cash and cash equivalents, end of period	56,099		91,071
Supplemental information
Cash paid for interest, net of interest capitalized	69,043		87,116
Cash paid for income taxes	1,903		1,280
Supplemental schedule of noncash investing and financing activities
Distributions declared but not paid	39,319		34,548
Value of shares issued under benefit plans, net of cancellations	18,912		14,465
Conversion of operating partnership units to common shares	592		2,132
Accrual associated with construction and capital expenditures	12,557		4,140
Conversion of mezzanine note to joint venture equity			28,944
Change in fair value of available-for-sale investments, net of tax			1,914
Consolidation of joint venture at fair value, net of cash:
Real estate assets, net			92,726
In-place leases			1,193
Other assets			289
Mortgage debt assumed			52,144
Other liabilities			$ 561

[1] Equity in income (loss) excludes our ownership interest of fee income from various property management services with our joint ventures.