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Business Segments - Revenues from External Customers for Products and Services (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenue from External Customer [Line Items]
Real estate revenue	$ 45	$ 3,971	$ 6,868	$ 29,723
Leasing operations	4,924	4,920	14,749	14,165
Revenues	4,969	8,891	21,617	43,888
Real estate operations
Revenue from External Customer [Line Items]
Real estate revenue	45	3,971	6,868	29,723
Real Estate Operations | Developed Property
Revenue from External Customer [Line Items]
Real estate revenue	0	3,950	6,760	15,198
Real Estate Operations | Undeveloped Property
Revenue from External Customer [Line Items]
Real estate revenue	0	0	0	14,500
Real Estate Operations | Real Estate, Commissions And Other
Revenue from External Customer [Line Items]
Real estate revenue	45	21	108	25
Leasing Operations
Revenue from External Customer [Line Items]
Leasing operations	$ 4,924	$ 4,920	$ 14,749	$ 14,165

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Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

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