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Business Segments - Schedule of Operating Results and Certain Other Financial Data for Business Segments (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2026 | Mar. 31, 2025
Segment Reporting Information [Line Items] |  |
Revenues: | $ 10,594 | $ 10,306
Total general and administrative expenses | 4,085 | 2,577
Total operating profit | 512 | 2,325
Interest expense | 708 | 695
Depreciation, depletion and amortization: | 3,027 | 2,716
Operating expenses | 2,130 | 1,859
Property taxes | 1,025 | 938
Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Revenues: | 10,594 | 10,306
Operating profit (loss): | 4,597 | 4,902
Total general and administrative expenses | 4,085 | 2,577
Total operating profit | 512 | 2,325
Interest expense | 708 | 695
Depreciation, depletion and amortization: | 2,842 | 2,607
Operating expenses | 2,130 | 1,859
Property taxes | 1,025 | 938
Capital expenditures: | 13,424 | 3,100
Operating Segments | Industrial and commercial |  |
Segment Reporting Information [Line Items] |  |
Revenues: | 1,200 | 1,347
Operating profit (loss): | 181 | 643
Depreciation, depletion and amortization: | 566 | 391
Operating expenses | 326 | 233
Property taxes | 127 | 80
Capital expenditures: | 4 | 100
Operating Segments | Mining royalty lands |  |
Segment Reporting Information [Line Items] |  |
Revenues: | 3,717 | 3,234
Operating profit (loss): | 3,397 | 2,965
Depreciation, depletion and amortization: | 226 | 178
Operating expenses | 19 | 16
Property taxes | 75 | 75
Capital expenditures: | 148 | 48
Operating Segments | Development |  |
Segment Reporting Information [Line Items] |  |
Revenues: | 482 | 301
Operating profit (loss): | 167 | 85
Depreciation, depletion and amortization: | 43 | 43
Operating expenses | 59 | 25
Property taxes | 213 | 148
Capital expenditures: | 13,150 | 2,650
Operating Segments | Multifamily |  |
Segment Reporting Information [Line Items] |  |
Revenues: | 5,195 | 5,424
Operating profit (loss): | 852 | 1,209
Depreciation, depletion and amortization: | 2,007 | 1,995
Operating expenses | 1,726 | 1,585
Property taxes | 610 | 635
Capital expenditures: | $ 122 | $ 302

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