Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Operating Activities
Net income (loss)	$ 1,959	$ (379,228)	$ 20,348	$ (417,585)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization			104,047	152,292
Equity in net (income) loss from unconsolidated joint ventures	(4,325)	21,932	(115,485)	29,344
Distributions of cumulative earnings from unconsolidated joint ventures			237	409
Equity in net (gain) loss on sale of interest in unconsolidated joint venture interest/real estate	8,129	0	(18,635)	79
Purchase price and other fair value adjustments			49,227	17,170
Depreciable real estate reserves and impairment			65,839	305,916
Loss on sale of real estate, net	2,741	26,678	2,741	28,329
Loan loss reserves and other investment reserves, net of recoveries	0	0	0	6,890	$ 6,890
Gain on early extinguishment of debt	(17,777)	0	(17,777)	0
Deferred rents receivable			(2,009)	(14,357)
Non-cash lease expense			10,052	10,550
Other non-cash adjustments			24,194	(2,523)
Changes in operating assets and liabilities:
Tenant and other receivables			(8,312)	(3,805)
Related party receivables			4,959	(893)
Deferred lease costs			(7,669)	(5,891)
Other assets			11,631	750
Accounts payable, accrued expenses, other liabilities and security deposits			(60,375)	2,697
Deferred revenue			(64)	(585)
Lease liability - operating leases			(8,252)	(4,795)
Net cash provided by operating activities			54,697	103,992
Investing Activities
Additions to land, buildings and improvements			(108,063)	(134,190)
Acquisition deposits and deferred purchase price			(12,817)	0
Investments in unconsolidated joint ventures			(325,282)	(46,977)
Distributions in excess of cumulative earnings from unconsolidated joint ventures			66,735	72,823
Net proceeds from disposition of real estate/joint venture interest			457,142	97,563
Investments in marketable securities			(5,604)	0
Other investments			(5,530)	(17,779)
Origination of debt and preferred equity investments			(8,275)	(10,308)
Repayments or redemption of debt and preferred equity investments			63,496	0
Net cash provided by (used in) investing activities			121,802	(38,868)
Financing Activities
Proceeds from mortgages and other loans payable			493	0
Repayments of mortgages and other loans payable			(34,987)	(2,899)
Proceeds from revolving credit facility, term loans and unsecured notes			700,000	223,000
Repayments of revolving credit facility, term loans and unsecured notes			(720,000)	(218,000)
Proceeds from stock options exercised and DRSPP issuance			120	342
Redemption of preferred stock			0	(11,700)
Redemption of OP units			(24,915)	(5,250)
Distributions to noncontrolling interests in other partnerships			(2,807)	(763)
Contributions from noncontrolling interests in other partnerships			1,823	314
Distributions to noncontrolling interests in the Operating Partnership			(7,126)	(7,550)
Dividends paid on common and preferred stock			(108,462)	(114,983)
Deferred loan costs			(346)	(630)
Net cash used in financing activities			(196,207)	(138,119)
Net decrease in cash, cash equivalents, and restricted cash			(19,708)	(72,995)
Cash, cash equivalents, and restricted cash at beginning of year			335,519	384,054	384,054
Cash, cash equivalents, and restricted cash at end of period	315,811	311,059	315,811	311,059	335,519
Supplemental Disclosure of Non-Cash Investing and Financing Activities:
Fair value adjustment to noncontrolling interest in the Operating Partnership			42,477	11,198
Investment in joint venture			10,639	0
Deconsolidation of a subsidiary			0	101,351
Consolidation of a subsidiary			6,678	0
Consolidation of mortgage loan payable			205,000	0
Acquisition of subsidiary interest from noncontrolling interest			5,674	0
Contribution to consolidated joint venture interest			0	8,134
Extinguishment of debt			18,000	0
Debt and preferred equity investments			1,133	0
Removal of fully depreciated commercial real estate properties			4,585	7,747
Share repurchase or redemption payable			4,932	0
Cash and cash equivalents	199,501	191,979	199,501	191,979	221,823
Restricted cash	116,310	119,080	116,310	119,080	113,696
Total cash, cash equivalents, and restricted cash	$ 315,811	$ 311,059	$ 315,811	$ 311,059	$ 335,519