Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
OPERATING ACTIVITIES:
Net income (loss)	$ 74,144,000	$ 46,613,000	$ (79,084,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Share-based compensation expense	65,273,000	52,675,000	33,693,000
Depreciation and amortization, including amortization of debt issuance costs	195,795,000	215,659,000	164,580,000
Deferred rent	(39,174,000)	(14,056,000)	(10,388,000)
(Income) loss from unconsolidated real estate ventures, net	1,395,000	(39,409,000)	4,143,000
Amortization of above- and below-market lease intangibles, net	(791,000)	(220,000)	(862,000)
Amortization of lease incentives	6,336,000	3,406,000	4,023,000
Gain (reduction of gain) on bargain purchase	0	(7,606,000)	24,376,000
Loss on extinguishment of debt	5,805,000	4,536,000	701,000
Gain on sale of real estate	(104,991,000)	(52,183,000)	0
Net unrealized loss (gain) on derivative financial instruments not designated as cash flow hedges	50,000	(926,000)	(1,348,000)
Losses on operating lease receivables	1,560,000	3,298,000	3,807,000
Return on capital from unconsolidated real estate ventures	2,690,000	7,827,000	2,563,000
Other non-cash items	517,000	1,388,000	3,955,000
Deferred tax benefit	(1,336,000)	(718,000)	(10,408,000)
Impairment of corporate assets	10,170,000	0	0
Changes in operating assets and liabilities:
Tenant and other receivables	(8,382,000)	(5,582,000)	(2,098,000)
Other assets, net	(9,177,000)	(16,600,000)	(23,481,000)
Accounts payable and accrued expenses	(7,678,000)	(5,984,000)	16,160,000
Other liabilities, net	(18,220,000)	(19,137,000)	(7,397,000)
Net cash provided by operating activities	173,986,000	188,193,000	74,183,000
INVESTING ACTIVITIES:
Development costs, construction in progress and real estate additions	(441,014,000)	(385,943,000)	(210,593,000)
Acquisition of real estate	165,208,000	23,246,000	0
Cash and restricted cash received in connection with the Combination, net			97,416,000
Deposits for real estate acquisitions	(850,000)	0	0
Proceeds from sale of real estate	377,511,000	413,077,000	0
Acquisition of interests in unconsolidated real estate ventures, net of cash acquired	0	(386,000)	(8,834,000)
Distributions of capital from unconsolidated real estate ventures	7,557,000	14,408,000	6,929,000
Distributions of capital from unconsolidated real estate ventures	0	80,279,000	0
Investments in and advances to unconsolidated real estate ventures	(18,668,000)	(31,197,000)	(16,321,000)
Repayment of notes receivable	0	0	50,934,000
Other	0	(665,000)	(2,207,000)
Proceeds from repayment of receivable from former parent	0	0	75,000,000
Net cash (used in) provided by investing activities	(240,672,000)	66,327,000	(7,676,000)
FINANCING ACTIVITIES:
Contributions from former parent, net	0	0	160,203,000
Acquisition of interest in consolidated real estate venture	0	(5,550,000)	0
Repayment of borrowings from former parent	0	0	(115,630,000)
Proceeds from borrowings from former parent	0	0	4,000,000
Finance lease payments	(137,000)	(114,000)	(17,827,000)
Borrowings under mortgages payable	2,200,000	118,141,000	366,239,000
Borrowings under revolving credit facility	200,000,000	35,000,000	115,751,000
Borrowings under unsecured term loans	0	250,000,000	50,000,000
Repayments of mortgages payable	(719,003,000)	(312,894,000)	(272,905,000)
Repayments of revolving credit facility	0	150,751,000	0
Debt issuance costs	515,000	3,114,000	19,287,000
Proceeds from the issuance of common stock, net of issuance costs	472,780,000	0	0
Proceeds from common stock issued pursuant to ESPP	1,457,000	597,000	0
Dividends paid to common shareholders	(129,834,000)	(107,372,000)	(26,540,000)
Distributions to redeemable noncontrolling interests	(17,390,000)	(17,398,000)	(4,556,000)
Contributions from noncontrolling interests	207,000	250,000	357,000
Distributions to noncontrolling interests	(95,000)	(340,000)	(18,000)
Net cash (used in) provided by in financing activities	(190,330,000)	(193,545,000)	239,787,000
Net (decrease) increase in cash and cash equivalents and restricted cash	(257,016,000)	60,975,000	306,294,000
Cash and cash equivalents and restricted cash as of the beginning of the period	399,532,000	338,557,000	32,263,000
Cash and cash equivalents and restricted cash as of the end of the period	142,516,000	399,532,000	338,557,000
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AS OF END OF THE PERIOD:
Cash and cash equivalents and restricted cash	399,532,000	399,532,000	32,263,000
SUPPLEMENTAL DISCLOSURE OF CASH FLOW AND NON-CASH INFORMATION:
Transfer of mortgage payable to former parent	0	0	115,630,000
Cash paid for interest (net of capitalized interest of $29,806, $20,804 and $12,727 in 2019, 2018 and 2017)	49,437,000	64,605,000	52,388,000
Accrued capital expenditures included in accounts payable and accrued expenses	84,076,000	53,073,000	12,445,000
Write-off of fully depreciated assets	66,533,000	52,272,000	55,998,000
Cash received (payments) for income taxes	282,000	(1,965,000)	3,396,000
Deconsolidation of properties	181,813,000	95,923,000	0
Acquisition of consolidated real estate venture	0	0	5,420,000
Fair value of OP Unit redemptions	(57,318,000)	(109,208,000)	0
Initial recognition of operating right-of-use assets	35,318,000	0	0
Initial recognition of lease liabilities related to operating right-of-use assets	37,922,000	0	0
Cash paid for amounts included in the measurement of lease liabilities for operating leases	6,202,000	0	0
Issuance of common limited partnership units at the Separation	0	0	96,632,000
Issuance of common shares at the Separation	0	0	2,330,579,000
Issuance of common shares in connection with the Combination	0	0	864,918,000
Issuance of common limited partnership units in connection with the Combination	0	0	359,967,000
Contribution from former parent in connection with the Separation	$ 0	$ 0	$ 172,817,000