CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income		$ (1,749)	$ (65,251)	$ 26,030
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization		135,984	135,917	123,439
Gain on disposition of properties and other investments		0	(58,634)	(10,521)
Net unrealized holding (gains) losses on investments		(1,634)	37,751	(51,925)
Stock compensation expense		12,753	11,122	12,430
Straight-line rents		(1,392)	(8,669)	(6,726)
Equity in losses (earnings) of unconsolidated affiliates		7,677	32,907	(5,330)
Distributions of operating income from unconsolidated affiliates		3,844	24,179	3,828
Adjustments to straight-line rent reserves		0	(292)	2,682
Amortization of financing costs		6,481	5,639	4,396
Non-cash lease expense		3,596	3,462	3,721
Adjustments to allowance for credit loss		(1,241)	(102)	(2,796)
Acceleration of below market lease		(8,057)	0	0
Impairment charges		3,686	33,311	9,925
Termination of ground lease		0	0	(3,615)
Other, net		(5,818)	(7,675)	(5,304)
Changes in assets and liabilities:
Rents receivable		2,538	1,586	7,384
Other liabilities		15,492	(2,959)	7,856
Accounts payable and accrued expenses		2,045	(2,141)	572
Prepaid expenses and other assets		(14,756)	(3,452)	(7,427)
Lease liability - operating leases		(3,691)	(3,488)	(3,636)
Net cash provided by operating activities		155,758	133,211	104,983
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition of real estate		(126,545)	(242,633)	(161,846)
Proceeds from the disposition of properties and other investments, net		0	224,558	63,901
Investments in and advances to unconsolidated affiliates		(53,736)	(154,695)	(14,835)
Development, construction and property improvement costs		(69,540)	(51,046)	(40,671)
Refund (deposits) for properties under purchase contract		1,080	(729)	0
Deposits for properties under sale contract		1,515	2,000	0
Change in control of previously unconsolidated affiliate		0	3,592	0
Return of capital from unconsolidated affiliates		44,486	77,774	17,722
Payment of deferred leasing costs		(9,007)	(7,997)	(4,914)
Acquisition of investment interests		0	(4,527)	0
Proceeds from sale of marketable securities		4,636	0	0
Proceeds from repayment of notes receivable		0	29,530	0
Issuance of notes receivable		(1,426)	0	(57,895)
Net cash used in investing activities		(208,537)	(124,173)	(198,538)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from unsecured debt		283,989	850,120	323,200
Principal payments on unsecured debt		(209,599)	(656,556)	(206,781)
Proceeds from the sale of Common Shares		0	119,485	63,876
Capital contributions from noncontrolling interests		59,926	109,428	30,164
Principal payments on mortgage and other notes		(112,283)	(447,998)	(98,602)
Distributions to noncontrolling interests		(36,389)	(84,723)	(30,410)
Dividends paid to Common Shareholders		(68,568)	(64,586)	(39,476)
Proceeds received from mortgage and other notes		132,902	204,138	56,847
Payment of deferred financing and other costs		(4,026)	(9,348)	(7,436)
Acquisition of noncontrolling interest		0	(24,336)	0
Payments of finance lease obligations		(100)	0	(63)
Net cash provided by (used in) financing activities		45,852	(4,376)	91,319
Changes in cash, cash equivalents and restricted cash		(6,927)	4,662	(2,236)
Cash and cash equivalents of $17,158, $17,746 and $18,699 and restricted cash of $15,063, $9,813 and $11,096, respectively, beginning of year		32,221	27,559	29,795
Cash and cash equivalents of $17,481, $17,158 and $17,746 and restricted cash of $7,813, $15,063 and $9,813, respectively, end of year		25,294	32,221	27,559
Supplemental disclosure of cash flow information
Cash paid during the period for interest, net of capitalized interest of $7,206 and $4,166 and $3,421 respectively (a)	[1]	119,550	65,109	44,663
Cash paid for income taxes, net of (refunds)		301	11	147
Supplemental disclosure of non-cash investing and financing activities
Distribution declared and payable		18,372	18,368	14,314
Assumption of accounts payable and accrued expenses through acquisition of real estate		645	4,062	1,319
Right-of-use assets, operating leases exchanged for operating lease liabilities		0	0	412
Disposition of 146 Geary Street upon deed-in-lieu of foreclosure		19,338	0	0
Extinguishment of a mortgage note for 146 Geary Street upon deed-in-lieu of foreclosure		(19,338)	0	0
Issuance of note receivable used as capital contributions from redeemable noncontrolling interests		796	65,945	0
Accrued interest on note receivable recorded to redeemable noncontrolling interest		9,350	3,923	0
Distributions to noncontrolling interests of marketable securities		49,117	0	0
Reclassification of investment in unconsolidated affiliate to marketable securities		32,745	0	0
Reclassification of noncontrolling interest in excess of amount paid to additional paid-in capital		0	67,475	0
Acquisition of real estate through assumption of debt		0	0	31,801
Settlement of note receivable through cancellation of OP Units		0	0	479
Change in control of previously unconsolidated (consolidated) investment
Increase in real estate		0	(55,791)	0
Increase in mortgage notes payable		0	35,970	0
Decrease in investments in and advances to unconsolidated affiliates		0	17,822	0
Decrease in notes receivable		0	5,306	0
Decrease in reserve on note receivable		0	(4,582)	0
Decrease in accrued interest on notes receivable		0	4,691	0
Change in other assets and liabilities		0	176	0
Increase in cash and restricted cash upon change of control		$ 0	$ 3,592	$ 0

[1] Interest paid for the year ended December 31, 2023, 2022 and 2021 excludes the cash flows from net settlements on interest rate swap contracts, which was a net receipt of cash of $28.7 million, a net payment of $8.3 million, and a net receipt of $29.9 million, respectively.