Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		$ 16,813	$ 0
Cash flows from operating activities
Net income		39,721	40,525
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization		80,274	70,224
Distributions of income from joint ventures		1,914	1,815
Equity in income of joint ventures	[1]	(1,912)	(1,829)
Share-based compensation		4,030	4,183
Net change in operating accounts and other		(31,376)	(27,764)
Net cash from operating activities		92,651	87,154
Cash flows from investing activities
Development and capital improvements, including land		(79,498)	(71,828)
Acquisition of operating properties		(94,885)	(201,899)
Increase in non-real estate assets		(2,520)	(2,279)
Other		146	449
Net cash from investing activities		(176,757)	(275,557)
Cash flows from financing activities
Borrowings on unsecured credit facility and other short-term borrowings		638,000	0
Repayments on unsecured credit facility and other short-term borrowings		(396,000)	0
Repayment of notes payable		(439,603)	(358)
Distributions to common shareholders and non-controlling interests		(74,982)	(72,943)
Proceeds from issuance of common shares		328,374	0
Payments of Financing Costs		(5,285)	(248)
Other		1,746	584
Net cash from financing activities		52,250	(72,965)
Net increase (decrease) in cash, cash equivalents, and restricted cash		(31,856)	(261,368)
Total cash, cash equivalents, and restricted cash, beginning of year		43,603	377,805
Total cash, cash equivalents, and restricted cash, end of period		11,747	116,437
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Total cash, cash equivalents, and restricted cash		43,603	377,805
Supplemental information
Cash paid for interest, net of interest capitalized		13,997	16,701
Supplemental schedule of noncash investing and financing activities
Distributions declared but not paid		80,771	75,083
Value of shares issued under benefit plans, net of cancellations		16,930	16,471
Accrual associated with construction and capital expenditures		$ 22,180	$ 23,204

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