Business Segments - Information Pertaining to Assets of Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Information pretaining to assets of the business segments
Identifiable Assets	$ 439,701	$ 431,919	$ 431,923
Depreciation and amortization	4,549	5,090	4,871
Capital Expenditures	26,380	28,048	24,775
Operating Segments | Real estate - commercial/industrial
Information pretaining to assets of the business segments
Identifiable Assets	65,290	67,550	67,640
Depreciation and amortization	551	469	645
Capital Expenditures	5,196	7,023	8,391
Operating Segments | Real estate - resort/residential
Information pretaining to assets of the business segments
Identifiable Assets	243,963	228,064	212,534
Depreciation and amortization	77	71	76
Capital Expenditures	16,013	16,404	10,214
Operating Segments | Mineral resources
Information pretaining to assets of the business segments
Identifiable Assets	45,066	46,025	47,434
Depreciation and amortization	1,357	1,501	1,351
Capital Expenditures	2,161	1,199	0
Operating Segments | Farming
Information pretaining to assets of the business segments
Identifiable Assets	36,895	32,542	34,464
Depreciation and amortization	1,150	929	1,633
Capital Expenditures	2,006	2,583	4,701
Operating Segments | Ranch operations
Information pretaining to assets of the business segments
Identifiable Assets	3,893	4,313	4,295
Depreciation and amortization	641	460	453
Capital Expenditures	523	299	561
Corporate
Information pretaining to assets of the business segments
Identifiable Assets	44,594	53,425	65,556
Depreciation and amortization	773	1,660	713
Capital Expenditures	$ 481	$ 540	$ 908