Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
OPERATING ACTIVITIES:
Net income (loss)	$ (26,391)	$ (17,093)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Share-based compensation expense	38,320	53,183
Depreciation and amortization, including amortization of deferred financing costs	181,217	160,395
Deferred rent	(17,463)	(19,124)
(Income) loss from unconsolidated real estate ventures, net	(23,513)	17,142
Amortization of market lease intangibles, net	(896)	(356)
Amortization of lease incentives	6,083	5,144
Loss on extinguishment of debt		33
Gain on sale of real estate	(11,290)	(59,477)
Loss on operating lease and other receivables	1,071	14,750
Return on capital from unconsolidated real estate ventures	13,212	3,697
Other non-cash items	583	265
Changes in operating assets and liabilities:
Tenant and other receivables	3,704	(4,757)
Other assets, net	(12,059)	(11,566)
Accounts payable and accrued expenses	5,954	1,366
Other liabilities, net	(4,120)	(15,747)
Net cash provided by operating activities	154,412	127,855
INVESTING ACTIVITIES:
Development costs, construction in progress and real estate additions	(108,361)	(245,456)
Deposits for real estate and other acquisitions	(10,263)	(25,274)
Proceeds from sale of real estate	14,370	154,493
Distributions of capital from unconsolidated real estate ventures	40,188	70,818
Investments in unconsolidated real estate ventures and other	(32,685)	(12,277)
Net cash used in investing activities	(96,751)	(57,696)
FINANCING ACTIVITIES:
Borrowings under mortgages payable	85,000	580,105
Borrowings under revolving credit facility		500,000
Borrowings under unsecured term loans		100,000
Repayments of mortgages payable	(4,462)	(6,680)
Repayments of revolving credit facility		(700,000)
Debt issuance costs	(5,747)	(14,856)
Finance lease payments		(3,281)
Proceeds from common shares issued pursuant to ESPP	880	887
Common shares repurchased	(82,300)	(74,434)
Dividends paid to common shareholders	(88,928)	(90,347)
Distributions to redeemable noncontrolling interests	(13,705)	(11,333)
Distributions to noncontrolling interests	(22)	(23)
Contributions from noncontrolling interests	17,464
Net cash (used in) provided by financing activities	(91,820)	280,038
Net (decrease) increase in cash and cash equivalents and restricted cash	(34,159)	350,197
Cash and cash equivalents and restricted cash, beginning of period	263,336	142,516
Cash and cash equivalents and restricted cash, end of period	229,177	492,713
SUPPLEMENTAL DISCLOSURE OF CASH FLOW AND NON-CASH INFORMATION:
Cash paid for interest (net of capitalized interest of $4,854 and $11,545 in 2021 and 2020)	46,010	40,744
Accrued capital expenditures included in accounts payable and accrued expenses	41,660	51,092
Write-off of fully depreciated assets	46,278	29,393
Deconsolidation of real estate asset	26,476
Conversion of common limited partnership units to common shares	27,350	40,674
Derecognition of operating lease right-of-use assets		(13,151)
Derecognition of liabilities related to operating lease right-of-use assets		(13,151)
Recognition of finance lease right-of-use assets		42,354
Recognition of liabilities related to finance lease right-of-use assets		40,684
Cash paid for amounts included in the measurement of lease liabilities for operating leases	$ 1,761	$ 4,603