Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
OPERATING ACTIVITIES
Net income	$ 360,542	$ 249,026	$ 297,870
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	239,758	244,245	216,050
Gain (Loss) on Sale of Properties, Net of Applicable Income Taxes	(116,393)	(11,915)	(77,922)
Early extinguishment of debt	0	0	12,273
Loss from partnerships	2,012	3,398	417
Other, net	169	4,147	(2,674)
Changes in assets and liabilities, net of effects of acquisitions and dispositions:
Proceeds from new market tax credit transaction, net of deferred costs	0	12,353	0
(Increase) decrease in accounts receivable, net	(16,128)	917	2,059
Increase in prepaid expenses and other assets	(10,253)	(2,070)	(3,695)
Increase in accounts payable and accrued expenses	2,327	2,650	14,242
(Decrease) increase in security deposits and other liabilities	(115)	13,937	208
Net cash provided by operating activities	461,919	516,688	458,828
INVESTING ACTIVITIES
Acquisition of real estate	(204,516)	(13,503)	(437,772)
Capital expenditures - development and redevelopment	(327,074)	(302,120)	(441,984)
Capital expenditures - other	(82,836)	(66,138)	(76,952)
Proceeds from sale of real estate	321,997	177,775	136,055
Proceeds from partnership formation	0	37,998	0
Investment in partnerships	(1,052)	(1,037)	(696)
Distribution from partnerships in excess of earnings	2,765	275	1,729
Leasing costs	(25,459)	(25,430)	(16,656)
Issuance of mortgage and other notes receivable, net	(357)	(67)	(1,646)
Net cash used in investing activities	(316,532)	(192,247)	(837,922)
FINANCING ACTIVITIES
Net (repayments) borrowings under revolving credit facility, including costs	(4,012)	(41,000)	41,000
Issuance of senior notes, net of costs	399,913	0	572,134
Redemption and retirement of senior notes	0	0	(161,930)
Repayment of mortgages, finance leases, and notes payable	(301,029)	(16,620)	(56,328)
Issuance of common shares, net of costs	143,027	130,918	118,583
Issuance of preferred shares, net of costs	0	0	144,991
Dividends paid to common and preferred shareholders	(313,649)	(301,194)	(282,995)
Shares withheld for employee taxes	(4,626)	(958)	(4,229)
Proceeds from Noncontrolling Interests	404	2,838	13,449
Distributions to and redemptions of noncontrolling interests	(20,133)	(15,293)	(15,230)
Net cash (used in) provided by financing activities	(100,105)	(241,309)	369,445
Increase (decrease) in cash, cash equivalents, and restricted cash	45,282	83,132	(9,649)
Cash, cash equivalents, and restricted cash at beginning of year	108,332	25,200	34,849
Cash, cash equivalents, and restricted cash at end of year	$ 153,614	$ 108,332	$ 25,200