Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
OPERATING ACTIVITIES:
Net income	$ 7,912	$ 24,920
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation expense	38,174	32,114
Depreciation and amortization, including amortization of debt issuance costs	102,896	97,053
Deferred rent	(11,728)	(18,342)
(Income) loss from unconsolidated real estate ventures, net	16,177	(1,791)
Amortization of market lease intangibles, net	(260)	(272)
Amortization of lease incentives	3,525	3,789
Loss on extinguishment of debt	33	1,889
Gain on sale of real estate	(59,477)	(39,033)
Net unrealized loss (gain) on ineffective derivative financial instruments	(30)	48
Losses on operating lease and other receivables	10,614	497
Return on capital from unconsolidated real estate ventures	1,877	1,493
Other non-cash items	104	271
Changes in operating assets and liabilities:
Tenant and other receivables	(10,198)	(6,232)
Other assets, net	(87)	(2,940)
Accounts payable and accrued expenses	(1,617)	(28,513)
Other liabilities, net	(12,396)	(12,168)
Net cash provided by operating activities	85,519	52,783
INVESTING ACTIVITIES:
Development costs, construction in progress and real estate additions	181,232	181,007
Deposits for real estate acquisitions		(8,525)
Proceeds from sale of real estate	154,493	117,676
Distributions of capital from unconsolidated real estate ventures	70,818	7,557
Investments in unconsolidated real estate ventures	(10,733)	(4,409)
Net cash provided by (used in) investing activities	33,346	(68,708)
FINANCING ACTIVITIES:
Finance lease payments	(3,031)	(66)
Borrowings under mortgages payable	195,159
Borrowings under revolving credit facility	500,000
Borrowings under unsecured term loans	100,000
Repayments of mortgages payable	(4,437)	(480,674)
Repayments of revolving credit facility	(200,000)
Debt issuance costs	(9,774)	(515)
Proceeds from the issuance of common stock, net of issuance costs		473,527
Proceeds from common stock issued pursuant to ESPP	887
Common shares repurchased	(41,192)
Dividends paid to common shareholders	(60,327)	(69,473)
Distributions to redeemable noncontrolling interests	(7,610)	(9,734)
Distributions to noncontrolling interests	(23)	(19)
Contributions from noncontrolling interests		125
Net cash provided by (used in) financing activities	469,652	(86,829)
Net increase (decrease) in cash and cash equivalents and restricted cash	588,517	(102,754)
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	731,033	296,778
SUPPLEMENTAL DISCLOSURE OF CASH FLOW AND NON-CASH INFORMATION:
Cash paid for interest (net of capitalized interest of $8,633 and $14,953 in 2020 and 2019)	25,647	29,179
Accrued capital expenditures included in accounts payable and accrued expenses	70,367	89,048
Write-off of fully depreciated assets	13,378	26,974
Conversion of common limited partnership units to common shares	35,878	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	$ 4,015	$ 3,068