Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 95,430	$ 89,734
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	51,749	49,432
Amortization of deferred financing costs	3,021	3,103
Non-cash interest expense related to amortization of discount on equity component of exchangeable senior notes	1,209	1,269
Compensation expense related to stock-based awards	2,726	1,990
Distributions from unconsolidated real estate ventures in excess of earnings	1,501	1,123
Changes in operating assets and liabilities:
Other assets	(737)	2,898
Accounts payable and accrued expenses	10,434	(30,069)
Other liabilities	6,275	(6,359)
Net cash provided by operating activities	171,608	113,121
Cash flows from investing activities:
Acquisition of real estate assets	(76,122)	(39,136)
Development and redevelopment of real estate assets	(11,106)	(5,246)
Proceeds from sale of real estate assets, investments in real estate ventures and other assets	753	0
Investment in unconsolidated real estate ventures	(438)	(1,519)
Return of investment in unconsolidated real estate ventures	47,944	581
Principal payments received from notes receivable	9,172	44,869
Purchase of equipment and fixtures	(1,131)	(1,292)
Net cash used in investing activities	(30,928)	(1,743)
Cash flows from financing activities:
Proceeds from notes payable and revolving lines of credit	162,000	169,000
Principal payments on notes payable and revolving lines of credit	(168,204)	(187,916)
Deferred financing costs	(117)	(253)
Repurchase of exchangeable senior notes	(58,464)	0
Net proceeds from exercise of stock options	799	0
Redemption of Operating Partnership units held by noncontrolling interests	(2,558)	(1,754)
Contributions from noncontrolling interests	120	0
Dividends paid on common stock	(98,327)	(98,212)
Distributions to noncontrolling interests	(7,909)	(8,443)
Net cash used in financing activities	(172,660)	(127,578)
Net decrease in cash, cash equivalents, and restricted cash	(31,980)	(16,200)
Cash, cash equivalents, and restricted cash, beginning of the period	86,044	57,742
Cash, cash equivalents, and restricted cash, end of the period	54,064	41,542
Supplemental schedule of cash flow information
Interest paid	37,007	37,570
Income taxes paid	492	5,059
Acquisitions of real estate assets
Real estate assets, net	70,787	25,556
Investment in unconsolidated real estate ventures	(489)	0
Accrued construction costs and capital expenditures
Acquisition of real estate assets	526	4,797
Development and redevelopment of real estate assets	1,381	990
Accounts payable and accrued expenses	(1,907)	(5,787)
Acquisitions of real estate assets
Acquisitions of real estate assets
Real estate assets, net	$ 489	$ 0