CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021
Cash Flows from Operating Activities:
Net income (loss)		$ 11,384,000	$ (3,612,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		171,306,000	175,752,000
Straight-lining of rental revenue		(7,808,000)	(7,925,000)
Amortization of stock-based compensation expense		14,853,000	14,421,000
Loss from unconsolidated joint ventures		15,326,000	20,810,000
Amortization of deferred financing costs	[1]	4,614,000	7,306,000
Distributions of earnings from unconsolidated real estate funds		624,000	535,000
Distributions of earnings from unconsolidated joint ventures		34,000	3,950,000
Amortization of above and below-market leases, net		(589,000)	(2,335,000)
Income from unconsolidated real estate funds		(625,000)	(604,000)
Realized and unrealized gains on marketable securities			(1,271,000)
Other non-cash adjustments		1,084,000	2,330,000
Changes in operating assets and liabilities:
Accounts and other receivables		(4,283,000)	6,118,000
Deferred charges		(12,286,000)	(12,664,000)
Other assets		(21,764,000)	(30,014,000)
Accounts payable and accrued expenses		4,646,000	12,830,000
Other liabilities		(2,099,000)	2,433,000
Net cash provided by operating activities		174,417,000	188,060,000
Cash Flows from Investing Activities:
Additions to real estate		(71,284,000)	(74,134,000)
Due from affiliates		(59,000,000)
Repayment of amounts due from affiliates		59,000,000
Investments in and contributions of capital to unconsolidated joint ventures		(11,252,000)	(11,750,000)
Contributions of capital to unconsolidated real estate funds		(4,642,000)	(3,198,000)
Distributions of capital from unconsolidated real estate funds		1,506,000	3,959,000
Purchases of marketable securities			(21,562,000)
Sales of marketable securities			18,305,000
Net cash used in investing activities		(85,672,000)	(88,380,000)
Cash Flows from Financing Activities:
Dividends paid to common stockholders		(49,793,000)	(45,970,000)
Distributions paid to common unitholders		(4,666,000)	(4,612,000)
Distributions to noncontrolling interests		(33,814,000)	(19,616,000)
Contributions from noncontrolling interests			121,000
Repurchases of common shares		(20,000,000)
Repurchase of shares related to stock compensation agreements and related tax withholdings		(284,000)	(214,000)
Proceeds from notes and mortgages payable			888,566,000
Repayment of notes and mortgages payable			(850,000,000)
Debt issuance costs			(10,593,000)
Purchase of interest rate caps			(140,000)
Net cash used in financing activities		(108,557,000)	(42,458,000)
Net (decrease) increase in cash and cash equivalents and restricted cash		(19,812,000)	57,222,000
Cash and cash equivalents and restricted cash at beginning of period		529,666,000	465,324,000
Cash and cash equivalents and restricted cash at end of period		509,854,000	522,546,000
Reconciliation of Cash and Cash Equivalents and Restricted Cash:
Cash and cash equivalents at beginning of period		524,900,000	434,530,000
Restricted cash at beginning of period		4,766,000	30,794,000
Cash and cash equivalents and restricted cash at beginning of period		529,666,000	465,324,000
Cash and cash equivalents at end of period		469,398,000	494,569,000
Restricted cash at end of period		40,456,000	27,977,000
Cash and cash equivalents and restricted cash at end of period		509,854,000	522,546,000
Supplemental Disclosure of Cash Flow Information:
Cash payments for interest		102,534,000	98,917,000
Cash payments for income taxes, net of refunds		2,177,000	970,000
Non-Cash Transactions:
Common shares issued upon redemption of common units		108,484,000	165,000
Change in value of interest rate swaps and interest rate caps		34,450,000	995,000
Dividends and distributions declared but not yet paid		18,564,000	16,897,000
Write-off of fully amortized and/or depreciated assets		8,736,000	43,232,000
Additions to real estate included in accounts payable and accrued expenses		42,052,000	$ 17,842,000
Transfer of deposit to investment in unconsolidated joint ventures		6,230,000
Repurchase of common shares included in accounts payable and accrued expenses		$ 1,313,000

[1] Includes $761 of expense from the non-cash write-off of deferred financing costs in connection with the $860,000 refinancing of 1301 Avenue of the Americas in July 2021.