Discontinued Operations - Schedule of Operating Results Related to Curbline Properties (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Other income (expense):
Net income attributable to discontinued operations	$ 0	$ 8,415	$ 0	$ 17,846
Curbline [Member]
Revenue from Operations:
Rental income		27,944		55,810
Other income		212		385
Total revenue from operations		28,156		56,195
Rental operation expenses:
Operating and maintenance		3,059		5,991
Real estate taxes		2,975		5,996
General and administrative		66		169
Depreciation and amortization		9,333		18,533
Total rental operation expenses		15,433		30,689
Other income (expense):
Interest expense		(166)		(416)
Transaction costs and other expense		(4,142)		(7,244)
Total other income (expense)		(4,308)		(7,660)
Net income attributable to discontinued operations		$ 8,415		$ 17,846