Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017		Sep. 30, 2016
Cash Flows from Operating Activities:
Net Income	$ 180,062		$ 207,655
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	126,115		119,161
Amortization of debt deferred costs and intangibles, net	2,105		1,953
Impairment loss	15,012		43
Equity in earnings of real estate joint ventures and partnerships, net	(17,966)		(15,111)
Gain on sale and acquisition of real estate joint venture and partnership interests	0		(46,407)
Gain on sale of property	(86,566)		(68,298)
Distributions of income from real estate joint ventures and partnerships	1,012		868
Changes in accrued rent and accounts receivable, net	(9,526)		(5,869)
Changes in unamortized lease costs and other assets, net	(15,237)		(12,852)
Changes in accounts payable, accrued expenses and other liabilities, net	10,664		18,160
Other, net	4,529		669
Net cash provided by operating activities	210,204		199,972
Cash Flows from Investing Activities:
Acquisition of real estate and land	(1,862)		(438,286)
Development and capital improvements	(101,438)		(78,675)
Proceeds from sale of property and real estate equity investments	216,149		185,651
Change in restricted deposits and mortgage escrows	20,203		(14,653)
Real estate joint ventures and partnerships - Investments	(31,053)		(49,877)
Real estate joint ventures and partnerships - Distribution of capital	17,430		41,749
Purchase of investments	(4,241)		(4,740)
Proceeds from investments	4,250		1,250
Other, net	3,118		566
Net cash provided by (used in) investing activities	122,556		(357,015)
Cash Flows from Financing Activities:
Proceeds from issuance of debt	0		249,999
Principal payments of debt	(23,217)		(67,848)
Changes in unsecured credit facilities	(120,000)		(19,500)
Proceeds from issuance of common shares of beneficial interest, net	1,115		137,487
Common share dividends paid	(148,286)		(138,354)
Debt issuance and extinguishment costs paid	(395)		(5,230)
Distributions to noncontrolling interests	(16,752)		(6,252)
Other, net	(2,236)		(5,661)
Net cash (used in) provided by financing activities	(309,771)		144,641
Net increase (decrease) in cash and cash equivalents	22,989		(12,402)
Cash and cash equivalents at January 1	16,257	[1]	22,168
Cash and cash equivalents at September 30	39,246	[1]	9,766
Interest paid during the period (net of amount capitalized of $3,314 and $1,762, respectively)	63,564		60,379
Income taxes paid during the period	$ 1,009		$ 930

[1] Consolidated variable interest entities' assets and debt included in the above balances (see Note 15) at September 30, 2017 and December 31, 2016 are Property, net of $210,184 and $476,117; Accrued Rent and Accounts Receivable, net of $11,385 and $11,066; Cash and Cash Equivalents of $8,457 and $9,560; Debt, net of $46,473 and $47,112.