Reporting Segments and Related Information - Information Pertaining to Assets of Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Information pretaining to assets of the business segments
Identifiable Assets	$ 546,036	$ 536,349	$ 539,422
Depreciation and Amortization	4,594	4,938	5,036
Capital Expenditures	20,879	22,259	25,222
Operating Segments | Real estate - commercial/industrial
Information pretaining to assets of the business segments
Identifiable Assets	82,397	73,317	76,814
Depreciation and Amortization	463	486	517
Capital Expenditures	4,906	7,128	8,690
Operating Segments | Real estate - resort/residential
Information pretaining to assets of the business segments
Identifiable Assets	305,818	297,052	286,801
Depreciation and Amortization	31	39	51
Capital Expenditures	8,064	9,764	12,811
Operating Segments | Mineral resources
Information pretaining to assets of the business segments
Identifiable Assets	52,440	57,797	55,049
Depreciation and Amortization	1,368	1,384	1,371
Capital Expenditures	0	25	37
Operating Segments | Farming
Information pretaining to assets of the business segments
Identifiable Assets	47,160	38,090	41,258
Depreciation and Amortization	1,789	1,989	1,909
Capital Expenditures	7,416	5,145	3,362
Operating Segments | Ranch operations
Information pretaining to assets of the business segments
Identifiable Assets	2,079	2,442	2,624
Depreciation and Amortization	455	482	526
Capital Expenditures	306	91	213
Corporate expenses
Information pretaining to assets of the business segments
Identifiable Assets	56,142	67,651	76,876
Depreciation and Amortization	488	558	662
Capital Expenditures	$ 187	$ 106	$ 109