Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
OPERATING ACTIVITIES:
Net income (loss)	$ (24,069)	$ 48,175
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Share-based compensation expense	13,236	17,362
Depreciation and amortization, including amortization of debt issuance costs	65,747	49,360
Deferred rent	(6,594)	(6,614)
Loss from unconsolidated real estate ventures, net	943	2,692
Amortization of market lease intangibles, net	(458)	(163)
Amortization of lease incentives	2,345	1,609
Loss on extinguishment of debt		33
Gain on sale of real estate		(59,477)
Losses on operating lease and other receivables	501	2,718
Return on capital from unconsolidated real estate ventures	5,952	532
Other non-cash items	(633)	(163)
Changes in operating assets and liabilities:
Tenant and other receivables	9,836	(4,210)
Other assets, net	2,115	(1,105)
Accounts payable and accrued expenses	(842)	(5,968)
Other liabilities, net	(1,577)	(2,865)
Net cash provided by operating activities	66,502	41,916
INVESTING ACTIVITIES:
Development costs, construction in progress and real estate additions	(28,499)	(107,013)
Proceeds from sale of real estate		154,493
Investments in unconsolidated real estate ventures	(1,016)	(3,563)
Net cash (used in) provided by investing activities	(29,515)	43,917
FINANCING ACTIVITIES:
Finance lease payments		(2,642)
Borrowings under mortgages payable		175,000
Borrowings under revolving credit facility		200,000
Repayments of mortgages payable	(2,234)	(2,221)
Repayments of revolving credit facility		(200,000)
Debt issuance costs	(4,587)	(9,278)
Common shares repurchased	(19,203)	(41,177)
Dividends paid to common shareholders	(29,650)	(30,184)
Distributions to redeemable noncontrolling interests	(5,785)	(3,828)
Contributions from noncontrolling interests	9,683
Net cash (used in) provided by financing activities	(51,776)	85,670
Net (decrease) increase in cash and cash equivalents and restricted cash	(14,789)	171,503
Cash and cash equivalents and restricted cash as of the beginning of the period	263,336	142,516
Cash and cash equivalents and restricted cash as of the end of the period	248,547	314,019
SUPPLEMENTAL DISCLOSURE OF CASH FLOW AND NON-CASH INFORMATION:
Cash paid for interest (net of capitalized interest of $1,710 and $5,268 in 2021 and 2020)	14,929	10,927
Accrued capital expenditures included in accounts payable and accrued expenses	38,668	76,418
Write-off of fully depreciated assets	39,920	7,111
Conversion of common limited partnership units to common shares	3,919	31,126
Recognition (derecognition) of operating lease right-of-use assets		(13,151)
Recognition (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	$ 610	$ 1,396