CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	900 Third Avenue [Member]	One Front Street [Member]	Common Stock [Member]	Additional Paid in Capital [Member]	Additional Paid in Capital [Member] 900 Third Avenue [Member]	Additional Paid in Capital [Member] One Front Street [Member]	Earnings Less than Distributions [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Noncontrolling Interest [Member] Consolidated Joint Ventures [Member]	Noncontrolling Interest [Member] Consolidated Joint Ventures [Member] 900 Third Avenue [Member]	Noncontrolling Interest [Member] Consolidated Joint Ventures [Member] One Front Street [Member]	Noncontrolling Interest [Member] Consolidated Real Estate Related Funds [Member]	Noncontrolling Interest [Member] Operating Partnership [Member]
Beginning balance at Dec. 31, 2023	$ 4,014,888			$ 2,173	$ 4,133,801			$ (943,935)	$ 11,246	$ 413,925			$ 110,589	$ 287,089
Common stock, shares outstanding at Dec. 31, 2023				217,366,000
Net (loss) income	9,668							(7,642)		18,434			(408)	(716)
Common shares issued upon redemption of common units				$ 2	2,071									(2,073)
Common shares issued upon redemption of common units, shares				142,000
Common shares issued under Omnibus share plan, net of shares withheld for taxes	(178)							(178)
Common shares issued under Omnibus share plan, net of shares withheld for taxes, shares				11,000
Dividends and distributions	(16,758)							(15,218)						(1,540)
Contributions from noncontrolling interests	63,109									62,220			889
Distributions to noncontrolling interests	(20,755)									(2,444)			(18,311)
Change in value of interest rate swaps and interest rate caps	(14,241)								(13,044)					(1,197)
Pro rata share of other comprehensive income (loss) of unconsolidated joint ventures	38								36					2
Amortization of equity awards	15,635				748									14,887
Reallocation of noncontrolling interest					3,807									(3,807)
Ending balance at Sep. 30, 2024	4,051,406			$ 2,175	4,140,427			(966,973)	(1,762)	492,135			92,759	292,645
Common stock, shares outstanding at Sep. 30, 2024				217,519,000
Beginning balance at Jun. 30, 2024	4,055,663			$ 2,173	4,135,472			(957,285)	1,553	485,983			93,340	294,427
Common stock, shares outstanding at Jun. 30, 2024				217,455,000
Net (loss) income	(4,203)							(9,688)		6,959			(581)	(893)
Common shares issued upon redemption of common units				$ 2	954									(956)
Common shares issued upon redemption of common units, shares				66,000
Common shares issued under Omnibus share plan, net of shares withheld for taxes, shares				(2,000)
Distributions to noncontrolling interests	(807)									(807)
Change in value of interest rate swaps and interest rate caps	(3,586)								(3,285)					(301)
Pro rata share of other comprehensive income (loss) of unconsolidated joint ventures	(34)								(30)					(4)
Amortization of equity awards	4,373				239									4,134
Reallocation of noncontrolling interest					3,762									(3,762)
Ending balance at Sep. 30, 2024	4,051,406			$ 2,175	4,140,427			(966,973)	(1,762)	492,135			92,759	292,645
Common stock, shares outstanding at Sep. 30, 2024				217,519,000
Beginning balance at Dec. 31, 2024	$ 4,009,497			$ 2,175	4,144,301			(1,005,627)	428	495,340			82,875	290,005
Common stock, shares outstanding at Dec. 31, 2024	217,527,797			217,528,000
Net (loss) income	$ (56,008)							(58,758)		5,095			2,556	(4,901)
Common shares issued upon redemption of common units				$ 44	61,446									(61,490)
Common shares issued upon redemption of common units, shares				4,354,000
Common shares issued under Omnibus share plan, net of shares withheld for taxes	(140)							(140)
Common shares issued under Omnibus share plan, net of shares withheld for taxes, shares				15,000
Contributions from noncontrolling interests	11,723									11,723
Distributions to noncontrolling interests	(5,710)									(5,710)
Change in value of interest rate swaps and interest rate caps	(819)								(757)					(62)
Pro rata share of other comprehensive income (loss) of unconsolidated joint ventures	0
Amortization of equity awards	14,261				506									13,755
Sale of a interest		$ 92,757	$ 10,266			$ (71,912)	$ (63,430)				$ 164,669	$ 73,696
Reallocation of noncontrolling interest					14,871				329					(15,200)
Other	461				461
Ending balance at Sep. 30, 2025	$ 4,076,288			$ 2,219	4,086,243			(1,064,525)		744,813			85,431	222,107
Common stock, shares outstanding at Sep. 30, 2025	221,897,427			221,897,000
Beginning balance at Jun. 30, 2025	$ 4,102,398			$ 2,203	4,061,826			(1,035,578)	(9)	743,127			84,743	246,086
Common stock, shares outstanding at Jun. 30, 2025				220,311,000
Net (loss) income	(30,282)							(28,947)		279			688	(2,302)
Common shares issued upon redemption of common units				$ 16	21,821									(21,837)
Common shares issued upon redemption of common units, shares				1,586,000
Contributions from noncontrolling interests	3,347									3,347
Distributions to noncontrolling interests	(1,940)									(1,940)
Change in value of interest rate swaps and interest rate caps	(345)								(320)					(25)
Pro rata share of other comprehensive income (loss) of unconsolidated joint ventures	0
Amortization of equity awards	2,649				155									2,494
Reallocation of noncontrolling interest					1,980				$ 329					(2,309)
Other	461				461
Ending balance at Sep. 30, 2025	$ 4,076,288			$ 2,219	$ 4,086,243			$ (1,064,525)		$ 744,813			$ 85,431	$ 222,107
Common stock, shares outstanding at Sep. 30, 2025	221,897,427			221,897,000