Discontinued Operations - Schedule of Operating Results Related to Curbline Properties (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024		Dec. 31, 2023	Dec. 31, 2022
Other income (expense):
Transaction costs and other expense	$ (2,184)		$ (836)	$ (1,949)
Gain on disposition of real estate, net	633,219		218,655	46,644
Net income attributable to discontinued operations	6,060		36,372	29,598
Curbline [Member]
Revenue from Operations:
Rental income	85,386	[1]	93,004	72,855
Other income	572	[1]	656	281
Total revenue from operations	85,958	[1]	93,660	73,136
Rental operation expenses:
Operating and maintenance	9,532	[1]	10,653	7,385
Real estate taxes	9,307	[1]	11,261	7,990
General and administrative	208	[1]	0	0
Depreciation and amortization	29,556	[1]	31,849	26,534
Total rental operation expenses	48,603	[1]	53,763	41,909
Other income (expense):
Interest expense	(416)	[1]	(1,520)	(1,619)
Transaction costs and other expense	(30,879)	[1]	(2,376)	(10)
Gain on disposition of real estate, net	0	[1]	371	0
Total other income (expense)	(31,295)	[1]	(3,525)	(1,629)
Net income attributable to discontinued operations	$ 6,060	[1]	$ 36,372	$ 29,598

[1] Through September 30, 2024.