CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash Flows from Operating Activities:
Net (loss) income	$ 10,160,000	$ (8,244,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	113,022,000	118,230,000
Straight-lining of rental revenue	(4,001,000)	(9,632,000)
Amortization of stock-based compensation expense	10,704,000	10,229,000
Loss from unconsolidated joint ventures	9,529,000	21,033,000
Amortization of deferred financing costs	3,077,000	4,640,000
Distributions of earnings from unconsolidated real estate funds	304,000	266,000
Distributions of earnings from unconsolidated joint ventures	34,000	623,000
Amortization of above and below-market leases, net	(673,000)	(1,613,000)
Income from unconsolidated real estate funds	(325,000)	(328,000)
Realized and unrealized gains on marketable securities		(1,480,000)
Other non-cash adjustments	560,000	868,000
Changes in operating assets and liabilities:
Accounts and other receivables	(2,206,000)	4,136,000
Deferred charges	(5,097,000)	(4,506,000)
Other assets	2,741,000	(5,569,000)
Accounts payable and accrued expenses	(4,714,000)	3,698,000
Other liabilities	(2,013,000)	2,107,000
Net cash provided by operating activities	131,102,000	134,458,000
Cash Flows from Investing Activities:
Additions to real estate	(54,136,000)	(52,114,000)
Due from affiliates	(51,916,000)
Repayment of amounts due from affiliates	51,916,000
Investments in and contributions of capital to unconsolidated joint ventures	(11,252,000)	(11,750,000)
Contributions of capital to unconsolidated real estate funds	(4,219,000)
Distributions of capital from unconsolidated real estate funds	1,506,000
Purchases of marketable securities		(9,562,000)
Sales of marketable securities		11,381,000
Net cash used in investing activities	(68,101,000)	(62,045,000)
Cash Flows from Financing Activities:
Dividends paid to common stockholders	(32,307,000)	(30,643,000)
Distributions paid to common unitholders	(3,365,000)	(3,042,000)
Distributions to noncontrolling interests	(24,848,000)	(8,562,000)
Contributions from noncontrolling interests		121,000
Repurchase of shares related to stock compensation agreements and related tax withholdings	(280,000)	(200,000)
Proceeds from notes and mortgages payable		12,430,000
Net cash used in financing activities	(60,800,000)	(29,896,000)
Net increase in cash and cash equivalents and restricted cash	2,201,000	42,517,000
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	531,867,000	507,841,000
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	506,933,000	475,289,000
Restricted cash at end of period	24,934,000	32,552,000
Cash and cash equivalents and restricted cash at end of period	531,867,000	507,841,000
Supplemental Disclosure of Cash Flow Information:
Cash payments for interest	67,332,000	65,227,000
Cash payments for income taxes, net of refunds	1,941,000	210,000
Non-Cash Transactions:
Common shares issued upon redemption of common units	107,212,000	165,000
Change in value of interest rate swaps and interest rate caps	24,654,000
Dividends and distributions declared but not yet paid	18,787,000	16,897,000
Write-off of fully amortized and/or depreciated assets	8,617,000	37,149,000
Additions to real estate included in accounts payable and accrued expenses	7,212,000	$ 10,484,000
Transfer of deposit to investment in unconsolidated joint ventures	$ 6,230,000