Business Segments - Reconciliation of Revenues, Segment Profits (Losses) and Net Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues
Segment revenues									$ 51,147	$ 51,069	$ 45,000
Equity in earnings (losses)									6,324	5,294	4,006
Investment income									528	696	941
Other income									381	526	404
Total revenues and other income	$ 15,884	$ 12,187	$ 7,159	$ 16,826	$ 14,949	$ 14,056	$ 8,526	$ 14,760	52,056	52,291
Segment profits (losses) and net income (loss)
Segment profits									(3,196)	1,943	838
Costs and expenses									(54,343)	(49,126)	(44,162)
Income before income tax expense									4,037	8,459	6,189
Ranch operations
Revenues
Segment revenues									3,923	3,534	3,693
Segment profits (losses) and net income (loss)
Costs and expenses									(6,112)	(5,998)	(6,049)
Operating Segments | Reportable Segment
Revenues
Segment revenues									51,147	51,069	45,000
Total revenues and other income									58,380	57,585	50,351
Segment profits (losses) and net income (loss)
Segment profits									9,612	12,589	12,664
Operating Segments | Real estate - commercial/industrial
Revenues
Segment revenues									8,272	7,845	7,455
Equity in earnings (losses)									6,324	5,294	4,006
Segment profits (losses) and net income (loss)
Segment profits									1,578	639	602
Costs and expenses									(6,694)	(7,206)	(6,853)
Operating Segments | Real estate - resort/residential
Segment profits (losses) and net income (loss)
Segment profits									(2,349)	(2,608)	(2,231)
Costs and expenses									(2,349)	(2,608)	(2,231)
Operating Segments | Mineral resources
Revenues
Segment revenues									15,116	16,255	10,242
Segment profits (losses) and net income (loss)
Segment profits									7,720	9,837	8,965
Costs and expenses									(7,396)	(6,418)	(1,277)
Operating Segments | Farming
Revenues
Segment revenues									23,836	23,435	23,610
Segment profits (losses) and net income (loss)
Segment profits									4,852	7,185	7,684
Costs and expenses									(18,984)	(16,250)	(15,926)
Operating Segments | Ranch operations
Revenues
Segment revenues									3,923	3,534	3,693
Segment profits (losses) and net income (loss)
Segment profits									(2,189)	(2,464)	(2,356)
Corporate
Segment profits (losses) and net income (loss)
Costs and expenses									$ (12,808)	$ (10,646)	$ (11,826)