Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities
Net income		$ 492,725	$ 158,266
Income from discontinued operations, including gain on sale		(382,842)	(9,925)
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization		124,547	117,924
Gain on sale of operating properties, including land		(32,678)	(85,192)
Distributions of income from joint ventures		3,162	3,092
Equity in income of joint ventures	[1]	(3,186)	(2,913)
Share-based compensation		10,367	8,432
Net change in operating accounts and other		(2,566)	(13,444)
Net cash from continuing operating activities		209,529	176,240
Net cash from discontinued operating activities		12,537	18,382
Net cash from operating activities		222,066	194,622
Cash flows from investing activities
Development and capital improvements		(158,478)	(232,830)
Proceeds from sales of operating properties, including land		40,130	112,180
Change in restricted cash		(15,590)	107
Other		(5,031)	(3,555)
Net cash from continuing investing activities		(138,969)	(124,098)
Proceeds from discontinued operations		622,982	0
Net cash from discontinued investing activities		(1,890)	(5,091)
Net cash from investing activities		482,123	(129,189)
Cash flows from financing activities
Borrowings on unsecured credit facility and other short-term borrowings		1,305,000	186,000
Repayments on unsecured credit facility, other short-term borrowings		(1,549,000)	(4,000)
Repayment of notes payable		(1,370)	(251,432)
Distributions to common shareholders and non-controlling interests		(133,269)	(124,623)
Purchase of non-controlling interests		0	(9,500)
Common share options exercised		3,486	0
Other		2,073	712
Net cash from continuing financing activities		(373,080)	(202,843)
Net increase (decrease) in cash and cash equivalents		331,109	(137,410)
Cash and cash equivalents, beginning of period		10,617	153,918
Cash and cash equivalents, end of period		341,726	16,508
Supplemental information
Cash paid for interest, net of interest capitalized		47,069	49,715
Cash paid for income taxes		2,089	1,548
Supplemental schedule of noncash investing and financing activities
Distributions declared but not paid		69,116	64,253
Value of shares issued under benefit plans, net of cancellations		19,180	18,552
Accrual associated with construction and capital expenditures		$ 26,704	$ 21,510

[1] Equity in income excludes our ownership interest of fee income from various services provided by us to the Funds.