Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 58,014	$ 188,088
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of investment properties	(4,912)	(119,821)
Depreciation and amortization	135,836	152,546
Amortization of deferred financing costs and premium/discount on notes payable	1,808	(2,543)
Stock-based compensation expense, net of forfeitures	2,825	2,486
Effect of non-cash adjustments to rental revenues	(24,028)	(33,379)
Income from unconsolidated joint ventures	(10,173)	(43,362)
Operating distributions from unconsolidated joint ventures	15,056	6,615
Gain on extinguishment of debt	(8)	(2,258)
Changes in other operating assets and liabilities:
Change in other receivables and other assets, net	(435)	9,707
Change in operating liabilities, net	4,054	3,150
Net cash provided by operating activities	178,037	161,229
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from investment property sales	0	171,316
Property acquisition, development, and tenant asset expenditures	(132,468)	(229,811)
Purchase of tenant-in-common interest	0	(13,382)
Collection of notes receivable	0	5,161
Investment in unconsolidated joint ventures	(43,276)	(13,862)
Distributions from unconsolidated joint ventures	2,032	74,531
Change in notes receivable and other assets	(4,429)	(1,348)
Other	(4,261)	0
Net cash used in investing activities	(182,402)	(7,395)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from credit facility	0	589,300
Repayment of credit facility	0	(723,300)
Proceeds from issuance of notes payable	0	350,000
Repayment of notes payable	(28,719)	(493,774)
Payment of deferred financing costs	(6,166)	(2,048)
Common stock issued, net of expenses	0	211,598
Contributions from noncontrolling interests	252	1,588
Distributions to nonredeemable noncontrolling interests	(2,071)	(1,364)
Common dividends paid	(79,842)	(73,950)
Other	(1,709)	(601)
Net cash used in financing activities	(118,255)	(142,551)
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	(122,620)	11,283
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT BEGINNING OF PERIOD	205,745	51,321
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH AT END OF PERIOD	$ 83,125	$ 62,604