Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash Flows from Operating Activities:
Net Income	$ 136,774	$ 228,840
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	68,939	88,516
Amortization of debt deferred costs and intangibles, net	1,627	1,565
Non-cash lease expense	602	0
Impairment loss	74	0
Equity in earnings of real estate joint ventures and partnerships, net	(12,082)	(11,311)
Gain on sale of property	(69,848)	(155,998)
Distributions of income from real estate joint ventures and partnerships	9,508	8,676
Changes in accrued rent, accrued contract receivables and accounts receivable, net	20,361	10,286
Changes in unamortized lease costs and other assets, net	(11,791)	(8,282)
Changes in accounts payable, accrued expenses and other liabilities, net	(11,882)	(11,695)
Other, net	2,404	(10,835)
Net cash provided by operating activities	134,686	139,762
Cash Flows from Investing Activities:
Acquisition of real estate and land, net	(52,659)	(1,265)
Development and capital improvements	(95,895)	(70,015)
Proceeds from sale of property and real estate equity investments, net	194,394	326,319
Real estate joint ventures and partnerships - Investments	(24,355)	(15,369)
Real estate joint ventures and partnerships - Distribution of capital	2,340	3,155
Proceeds from investments	9,125	1,500
Other, net	3,019	4,454
Net cash provided by investing activities	35,969	248,779
Cash Flows from Financing Activities:
Proceeds from issuance of debt	0	638
Principal payments of debt	(3,173)	(253,955)
Changes in unsecured credit facilities	(5,000)	0
Proceeds from issuance of common shares of beneficial interest, net	764	1,603
Repurchase of common shares of beneficial interest, net	0	(18,564)
Common share dividends paid	(101,641)	(101,423)
Debt issuance and extinguishment costs paid	(310)	(1,183)
Distributions to noncontrolling interests	(3,161)	(4,593)
Contributions from noncontrolling interests	326	389
Other, net	(1,521)	912
Net cash used in financing activities	(113,716)	(376,176)
Net increase in cash, cash equivalents and restricted cash equivalents	56,939	12,365
Cash, cash equivalents and restricted cash equivalents at January 1	76,137	21,334
Cash, cash equivalents and restricted cash equivalents at June 30	133,076	33,699
Cash paid for interest (net of amount capitalized of $6,204 and $3,103, respectively)	28,995	35,018
Cash paid for income taxes	1,456	1,515
Cash paid for amounts included in lease liabilities	$ 1,565	$ 0