Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities
Net income		$ 796,146	$ 196,460
Income from discontinued operations, including gain on sale		(382,842)	(14,832)
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization		187,379	179,260
Gain on sale of operating properties, including land		(295,397)	(85,192)
Distributions of income from joint ventures		5,006	4,699
Equity in income of joint ventures	[1]	(5,052)	(4,487)
Share-based compensation		15,511	13,012
Net change in operating accounts and other		24,166	2,380
Net cash from continuing operating activities		344,917	291,300
Net cash from discontinued operating activities		12,594	26,353
Net cash from operating activities		357,511	317,653
Cash flows from investing activities
Development and capital improvements		(262,669)	(328,252)
Proceeds from sales of operating properties, including land		515,754	112,180
Payments to Acquire Short-term Investments		(100,000)	0
Other		(7,533)	(7,665)
Net cash from continuing investing activities		145,552	(223,737)
Proceeds from discontinued operations		622,982	0
Net cash from discontinued investing activities		(1,890)	(8,146)
Net cash from investing activities		766,644	(231,883)
Cash flows from financing activities
Borrowings on unsecured credit facility and other short-term borrowings		1,305,000	728,000
Repayments on unsecured credit facility, other short-term borrowings		(1,549,000)	(505,000)
Repayment of notes payable		(2,290)	(252,160)
Distributions to common shareholders and non-controlling interests		(580,542)	(188,876)
Purchase of non-controlling interests		0	(9,500)
Common share options exercised		3,835	0
Other		1,967	(1,777)
Net cash from financing activities		(821,030)	(229,313)
Net increase (decrease) in cash and cash equivalents		303,125	(143,543)
Cash and cash equivalents, beginning of period		10,617	153,918
Cash and cash equivalents, end of period		313,742	10,375
Supplemental information
Cash paid for interest, net of interest capitalized		62,995	65,748
Cash paid for income taxes		2,314	1,584
Supplemental schedule of noncash investing and financing activities
Distributions declared but not paid		82,861	64,276
Value of shares issued under benefit plans, net of cancellations		19,103	18,489
Accrual associated with construction and capital expenditures		$ 22,334	$ 17,440

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