Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
OPERATING ACTIVITIES:
Net income (loss)	$ (17,093)	$ 35,452
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation expense	53,183	47,432
Depreciation and amortization, including amortization of debt issuance costs	160,395	144,868
Deferred rent	(19,124)	(29,164)
(Income) loss from unconsolidated real estate ventures, net	17,142	(647)
Amortization of market lease intangibles, net	(356)	(486)
Amortization of lease incentives	5,144	4,344
Loss on extinguishment of debt	33	1,889
Gain on sale of real estate	(59,477)	(47,121)
Net unrealized loss on ineffective derivative financial instruments	173	50
Losses on operating lease and other receivables	14,750	1,281
Return on capital from unconsolidated real estate ventures	3,697	1,836
Other non-cash items	265	70
Changes in operating assets and liabilities:
Tenant and other receivables	(4,757)	(9,077)
Other assets, net	(11,566)	(13,858)
Accounts payable and accrued expenses	1,366	(17,171)
Other liabilities, net	(15,747)	(7,009)
Net cash provided by operating activities	127,855	112,639
INVESTING ACTIVITIES:
Development costs, construction in progress and real estate additions	(245,456)	(294,355)
Deposits for real estate and other acquisitions	(25,274)	(9,125)
Proceeds from sale of real estate	154,493	157,810
Distributions of capital from unconsolidated real estate ventures	70,818	7,557
Investments in unconsolidated real estate ventures	(12,277)	(7,325)
Net cash used in investing activities	(57,696)	(145,438)
FINANCING ACTIVITIES:
Finance lease payments	(3,281)	(103)
Borrowings under mortgages payable	580,105
Borrowings under revolving credit facility	500,000
Borrowings under unsecured term loans	100,000
Repayments of mortgages payable	(6,680)	(482,810)
Repayments of revolving credit facility	(700,000)
Debt issuance costs	(14,856)	(515)
Proceeds from the issuance of common stock, net of issuance costs		472,780
Proceeds from common stock issued pursuant to ESPP	887	747
Common shares repurchased	(74,434)
Dividends paid to common shareholders	(90,347)	(99,654)
Distributions to redeemable noncontrolling interests	(11,333)	(13,564)
Distributions to noncontrolling interests	(23)	(19)
Contributions from noncontrolling interests		125
Net cash provided by (used in) financing activities	280,038	(123,013)
Net increase (decrease) in cash and cash equivalents and restricted cash	350,197	(155,812)
Cash and cash equivalents and restricted cash as of the beginning of the period	142,516	399,532
Cash and cash equivalents and restricted cash as of the end of the period	492,713	243,720
SUPPLEMENTAL DISCLOSURE OF CASH FLOW AND NON-CASH INFORMATION:
Cash paid for interest (net of capitalized interest of $11,545 and $23,211 in 2020 and 2019)	40,744	38,563
Accrued capital expenditures included in accounts payable and accrued expenses	51,092	99,876
Write-off of fully depreciated assets	29,393	49,319
Conversion of common limited partnership units to common shares	40,674	57,318
Recognition (derecognition) of operating lease right-of-use assets	(13,151)	35,318
Recognition (derecognition) of liabilities related to operating lease right-of-use assets	(13,151)	37,922
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	$ 4,603	$ 4,629