CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash Flows from Operating Activities:
Net (loss) income	$ (99,576,000)	$ 11,384,000
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	181,778,000	171,306,000
Straight-lining of rental revenue	(1,305,000)	(7,808,000)
Amortization of stock-based compensation expense	14,011,000	14,853,000
Amortization of deferred financing costs	4,630,000	4,614,000
Loss from unconsolidated joint ventures	63,138,000	15,326,000
Distributions of earnings from unconsolidated joint ventures	354,000	34,000
Realized and unrealized losses on real estate related fund investments	46,775,000
Loss (income) from unconsolidated real estate related funds	867,000	(625,000)
Distributions of earnings from unconsolidated real estate related funds	84,000	624,000
Amortization of above and below-market leases, net	(3,929,000)	(589,000)
Other non-cash adjustments	526,000	1,084,000
Changes in operating assets and liabilities:
Real estate related fund investments	(9,631,000)
Accounts and other receivables	9,526,000	(4,283,000)
Deferred charges	(5,874,000)	(12,286,000)
Other assets	(19,734,000)	(21,764,000)
Accounts payable and accrued expenses	(9,738,000)	4,646,000
Other liabilities	3,695,000	(2,099,000)
Net cash provided by operating activities	175,597,000	174,417,000
Cash Flows from Investing Activities:
Additions to real estate	(67,373,000)	(71,284,000)
Investments in and contributions of capital to unconsolidated joint ventures	(40,715,000)	(11,252,000)
Advances to a partner in One Steuart Lane	(35,715,000)
Repayment of advances by a partner in One Steuart Lane	38,935,000
Contributions of capital to unconsolidated real estate related funds	(2,077,000)	(4,642,000)
Due from affiliates		(59,000,000)
Repayment of amounts due from affiliates		59,000,000
Distributions of capital from unconsolidated real estate related funds		1,506,000
Net cash used in investing activities	(106,945,000)	(85,672,000)
Cash Flows from Financing Activities:
Repayment of notes and mortgages payable	(273,000,000)
Proceeds from notes and mortgages payable	232,050,000
Contributions from noncontrolling interests in consolidated real estate related funds	54,812,000
Distributions to noncontrolling interests in consolidated real estate related funds	(7,802,000)
Dividends paid to common stockholders	(41,267,000)	(49,793,000)
Distributions paid to common unitholders	(3,058,000)	(4,666,000)
Distributions to noncontrolling interests in consolidated joint ventures	(7,053,000)	(33,814,000)
Settlement of accounts payable in connection with repurchases of common shares	(1,847,000)
Debt issuance costs	(576,000)
Repurchases of common shares		(20,000,000)
Repurchase of shares related to stock compensation agreements and related tax withholdings	(205,000)	(284,000)
Net cash provided by financing activities	(47,946,000)	(108,557,000)
Net increase (decrease) in cash and cash equivalents and restricted cash	20,706,000	(19,812,000)
Cash and cash equivalents and restricted cash at beginning of period	449,817,000	529,666,000
Cash and cash equivalents and restricted cash at end of period	470,523,000	509,854,000
Reconciliation of Cash and Cash Equivalents and Restricted Cash:
Cash and cash equivalents at beginning of period	408,905,000	524,900,000
Restricted cash at beginning of period	40,912,000	4,766,000
Cash and cash equivalents and restricted cash at beginning of period	449,817,000	529,666,000
Cash and cash equivalents at end of period	399,631,000	469,398,000
Restricted cash at end of period	70,892,000	40,456,000
Cash and cash equivalents and restricted cash at end of period	470,523,000	509,854,000
Supplemental Disclosure of Cash Flow Information:
Cash payments for interest	106,633,000	102,534,000
Cash payments for income taxes, net of refunds	723,000	2,177,000
Non-Cash Transactions:
Common shares issued upon redemption of common units	11,670,000	108,484,000
Dividends and distributions declared but not yet paid	8,357,000	18,564,000
Change in value of interest rate swaps and interest rate caps	(17,630,000)	34,450,000
Write-off of fully amortized and/or depreciated assets	22,274,000	8,736,000
Additions to real estate included in accounts payable and accrued expenses	$ 10,165,000	42,052,000
Transfer of deposit to investment in unconsolidated joint ventures		6,230,000
Repurchases of common shares included in accounts payable and accrued expenses		$ 1,313,000