CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash Flows from Operating Activities:
Net loss	$ (38,394,000)	$ (371,303,000)	$ (28,197,000)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	239,542,000	250,644,000	232,517,000
Straight-lining of rental revenue	(6,543,000)	(4,874,000)	(13,602,000)
Amortization of stock-based compensation expense	20,137,000	20,321,000	19,003,000
Amortization of deferred financing costs	10,250,000	6,219,000	6,156,000
Loss from unconsolidated joint ventures	2,298,000	20,126,000	21,566,000
Real estate impairment losses related to investments in unconsolidated joint ventures	45,061,000	250,172,000	31,685,000
Distributions of earnings from unconsolidated joint ventures	586,000	17,096,000	1,324,000
Realized and unrealized losses on real estate related fund investments	775,000	107,722,000	0
(Income) loss from unconsolidated real estate related funds	(273,000)	822,000	1,239,000
Distributions of earnings from unconsolidated real estate related funds	173,000	117,000	1,318,000
Amortization of above and below-market leases, net	(5,825,000)	(5,376,000)	(1,748,000)
Non-cash gain on extinguishment of IPO related tax liability	(15,437,000)	0	0
Loss recognized upon consolidation of real estate related fund investments that were previously unconsolidated	0	0	2,627,000
Other non-cash adjustments	287,000	669,000	1,188,000
Changes in operating assets and liabilities:
Real estate related fund investments	0	(3,128,000)	0
Accounts and other receivables	(176,000)	5,813,000	(8,284,000)
Deferred charges	(9,610,000)	(12,200,000)	(15,083,000)
Other assets	73,000	(3,542,000)	(7,545,000)
Accounts payable and accrued expenses	8,254,000	(13,663,000)	3,658,000
Other liabilities	13,748,000	12,224,000	(1,185,000)
Net cash provided by operating activities	264,926,000	277,859,000	246,637,000
Cash Flows from Investing Activities:
Additions to real estate	(118,158,000)	(100,526,000)	(125,805,000)
Proceeds from repayment of a mezzanine loan investment	10,000,000	0	0
Investment in a mezzanine loan	0	(20,000,000)	0
Investments in and contributions of capital to unconsolidated joint ventures	(2,740,000)	(40,715,000)	(15,812,000)
Distribution of capital from an unconsolidated joint venture	1,792,000	0	0
Advances to a partner in One Steuart Lane	0	(35,715,000)	0
Repayment of advances by a partner in One Steuart Lane	0	38,935,000	0
Contributions of capital to unconsolidated real estate related funds		(2,077,000)	(5,018,000)
Due from affiliates	0	0	(59,000,000)
Repayment of amounts due from affiliates	0	0	59,000,000
Distributions of capital from unconsolidated real estate related funds	0	0	1,506,000
Investment in real estate related funds	0	0	(7,454,000)
Net cash used in investing activities	(109,106,000)	(160,098,000)	(152,583,000)
Cash Flows from Financing Activities:
Repayment of notes and mortgages payable	(975,000,000)	(273,000,000)	0
Proceeds from notes and mortgages payable	850,000,000	232,050,000	0
Debt issuance costs	(10,649,000)	(648,000)	0
Contributions from noncontrolling interests in consolidated joint ventures	62,220,000	0	0
Distributions to noncontrolling interests in consolidated joint ventures	(3,267,000)	(8,657,000)	(40,699,000)
Contributions from noncontrolling interests in consolidated real estate related funds	889,000	55,837,000	3,257,000
Distributions to noncontrolling interests in consolidated real estate related funds	(18,311,000)	(8,828,000)	0
Dividends paid to common stockholders	(22,826,000)	(48,873,000)	(67,062,000)
Distributions paid to common unitholders	(2,292,000)	(3,808,000)	(5,962,000)
Deposit received for the sale of a 45.0% equity interest in 900 Third Avenue	9,450,000	0	0
Repurchase of shares related to stock compensation agreements and related tax withholdings	(186,000)	(205,000)	(284,000)
Repurchases of common shares	0	0	(63,153,000)
Settlement of accounts payable in connection with repurchases of common shares	0	(1,847,000)	0
Net cash used in financing activities	(109,972,000)	(57,979,000)	(173,903,000)
Net increase (decrease) in cash and cash equivalents and restricted cash	45,848,000	59,782,000	(79,849,000)
Cash and cash equivalents and restricted cash at beginning of period	509,599,000	449,817,000	529,666,000
Cash and cash equivalents and restricted cash at end of period	555,447,000	509,599,000	449,817,000
Reconciliation of Cash and Cash Equivalents and Restricted Cash:
Cash and cash equivalents at beginning of period	428,208,000	408,905,000	524,900,000
Restricted cash at beginning of period	81,391,000	40,912,000	4,766,000
Cash and cash equivalents and restricted cash at beginning of period	509,599,000	449,817,000	529,666,000
Cash and cash equivalents at end of period	375,056,000	428,208,000	408,905,000
Restricted cash at end of period	180,391,000	81,391,000	40,912,000
Cash and cash equivalents and restricted cash at end of period	555,447,000	509,599,000	449,817,000
Supplemental Disclosure of Cash Flow Information:
Cash payments for interest	156,194,000	144,388,000	139,332,000
Cash payments for income taxes, net of refunds	2,029,000	893,000	2,711,000
Non-Cash Transactions:
Write-off of fully amortized and/or depreciated assets	41,781,000	34,317,000	11,386,000
Change in value of interest rate swaps and interest rate caps	(12,433,000)	(25,444,000)	31,839,000
Additions to real estate included in accounts payable and accrued expenses	16,988,000	21,815,000	14,595,000
Common shares issued upon redemption of common units	2,230,000	11,871,000	128,743,000
Dividends and distributions declared but not yet paid	0	8,360,000	18,026,000
Transfer of deposit to investment in unconsolidated joint ventures	0	0	6,230,000
Repurchases of common shares included in accounts payable and accrued expenses	0	0	1,847,000
Increase (decrease) due to consolidation of real estate related fund investments that were previously unconsolidated:
Real estate related fund investments	0	0	100,500,000
Investments in unconsolidated real estate related funds	0	0	(8,965,000)
Noncontrolling interests in consolidated real estate related funds	$ 0	$ 0	$ 91,535,000