Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
OPERATING ACTIVITIES:
Net income (loss)	$ (89,725)	$ (67,261)	$ 74,144
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Share-based compensation expense	51,551	66,051	65,273
Depreciation and amortization, including amortization of deferred financing costs	240,454	225,597	195,795
Deferred rent	(21,964)	(20,084)	(39,174)
Loss from unconsolidated real estate ventures, net	2,070	20,336	1,395
Amortization of market lease intangibles, net	(1,189)	(442)	(791)
Amortization of lease incentives	7,973	6,603	6,336
Loss on extinguishment of debt		62	5,805
Impairment loss	25,144	10,232
Gain on sale of real estate	(11,290)	(59,477)	(104,991)
Loss on operating lease and other receivables	2,595	25,805	1,560
Income from investment funds, net	(3,620)
Return on capital from unconsolidated real estate ventures	15,912	4,302	2,690
Other non-cash items	(922)	4,326	567
Impairment of corporate assets			10,170
Changes in operating assets and liabilities:
Tenant and other receivables	8,812	(9,231)	(8,382)
Other assets, net	(12,780)	(11,075)	(9,177)
Accounts payable and accrued expenses	8,700	591	(7,678)
Other liabilities, net	(4,099)	(27,314)	(19,556)
Net cash provided by operating activities	217,622	169,021	173,986
INVESTING ACTIVITIES:
Development costs, construction in progress and real estate additions	(173,177)	(307,497)	(441,014)
Acquisition of real estate	(208,342)	(45,688)	(165,208)
Deposits for real estate and other acquisitions		(25,424)	(850)
Proceeds from sale of real estate	14,370	154,493	377,511
Distributions of capital from unconsolidated real estate ventures	40,188	71,065	7,557
Investments in unconsolidated real estate ventures and other	(41,780)	(14,639)	(18,668)
Net cash used in investing activities	(368,741)	(167,690)	(240,672)
FINANCING ACTIVITIES:
Borrowings under mortgages payable	190,000	580,105	2,200
Borrowings under revolving credit facility	300,000	500,000	200,000
Borrowings under unsecured term loans		100,000
Repayments of mortgages payable	(5,611)	(104,083)	(719,003)
Repayments of revolving credit facility		(700,000)
Debt issuance costs	(6,610)	(14,856)	(515)
Finance lease payments	(19,970)	(3,531)	(137)
Proceeds from the issuance of common stock, net of issuance costs			472,780
Proceeds from common shares issued pursuant to ESPP	1,594	1,715	1,457
Common shares repurchased	(157,686)	(104,774)
Dividends paid to common shareholders	(118,115)	(120,011)	(129,834)
Distributions to redeemable noncontrolling interests	(17,804)	(15,030)	(17,390)
Distributions to noncontrolling interests	(46)	(46)	(95)
Contributions from noncontrolling interests	24,126		207
Net cash provided by (used in) financing activities	189,878	119,489	(190,330)
Net increase (decrease) in cash and cash equivalents and restricted cash	38,759	120,820	(257,016)
Cash and cash equivalents and restricted cash, beginning of period	263,336	142,516	399,532
Cash and cash equivalents and restricted cash, end of period	302,095	263,336	142,516
SUPPLEMENTAL DISCLOSURE OF CASH FLOW AND NON-CASH INFORMATION:
Cash paid for interest (net of capitalized interest of $6,734, $13,189 and $29,806 in 2021, 2020 and 2019)	61,928	56,961	49,437
Accrued capital expenditures included in accounts payable and accrued expenses	43,290	43,188	84,076
Write-off of fully depreciated assets	61,123	30,798	66,533
Cash (paid) received for income taxes	(815)	1,187	282
Deconsolidation of real estate asset	26,476		181,813
Accrued dividends to common shareholders	28,665	29,650	30,184
Accrued distributions to redeemable noncontrolling interests	3,938	4,425	3,828
Conversion of common limited partnership units to common shares	29,634	47,517	57,318
Recognition (derecognition) of operating lease right-of-use assets	(1,596)	(13,151)	35,318
Recognition (derecognition) of liabilities related to operating lease right-of-use assets	(1,587)	(13,151)	37,922
Recognition of finance lease right-of-use assets	139,507	42,354
Recognition of liabilities related to finance lease right-of-use assets	141,574	40,684
Cash paid for amounts included in the measurement of lease liabilities for operating leases	$ 2,295	5,201	$ 6,202
Deferred purchase price related to acquisition		$ 19,479