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Business Segments - Schedule of Identifiable Net Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Segment Reporting Information [Line Items]
Identifiable net assets	$ 750,389	$ 735,145
Operating segments | Industrial and commercial
Segment Reporting Information [Line Items]
Identifiable net assets	62,205	62,260
Operating segments | Mining royalty lands
Segment Reporting Information [Line Items]
Identifiable net assets	47,683	47,729
Operating segments | Development
Segment Reporting Information [Line Items]
Identifiable net assets	204,113	187,237
Operating segments | Multifamily
Segment Reporting Information [Line Items]
Identifiable net assets	325,139	329,303
Cash items
Segment Reporting Information [Line Items]
Identifiable net assets	107,859	105,361
Unallocated corporate assets
Segment Reporting Information [Line Items]
Identifiable net assets	$ 3,390	$ 3,255

X

- Definition

Amount of asset recognized for present right to economic benefit.

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