Business Segments - Information Pretaining to Assets of Segments (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Information pretaining to assets of the business segments
Identifiable assets	$ 432,115	$ 342,879		$ 327,856
Other Depreciation and Amortization	4,871	4,226	4,954
Depreciation and amortization	4,871	4,226	4,954
Capital expenditures	24,775	21,558	20,669
Real estate - commercial/industrial
Information pretaining to assets of the business segments
Identifiable assets	80,646	58,390		57,151
Depreciation and amortization	1,098	1,205	1,852
Capital expenditures	8,952	12,296	11,672
Real estate- resort/residential
Information pretaining to assets of the business segments
Identifiable assets	199,528	124,568		118,627
Depreciation and amortization	76	78	77
Capital expenditures	10,214	2,957	4,479
Mineral resources
Information pretaining to assets of the business segments
Identifiable assets	47,434	1,063		1,449
Depreciation and amortization	1,351	0	0
Capital expenditures	0	0	0
Farming
Information pretaining to assets of the business segments
Identifiable assets	34,464	31,925		29,538
Depreciation and amortization	1,633	1,465	1,587
Capital expenditures	4,701	5,733	3,379
Corporate expenses
Information pretaining to assets of the business segments
Identifiable assets	70,043	126,933		121,091
Depreciation and amortization	713	1,478	1,438
Capital expenditures	$ 908	$ 572	$ 1,139