Reporting Segments and Related Information - Revenue Components of Farming Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue from External Customer [Line Items]
Net operating income (loss)	$ 3,050	$ (1,414)	$ 2,851	$ (7,122)
Farming Segment
Revenue from External Customer [Line Items]
Commercial/industrial revenues	10,836	7,466	12,573	9,398
Net operating income (loss)	4,295	(455)	3,003	(1,104)
Farming Segment | Almonds
Revenue from External Customer [Line Items]
Commercial/industrial revenues	1,761	1,778	2,935	2,568
Farming Segment | Pistachios
Revenue from External Customer [Line Items]
Commercial/industrial revenues	7,042	3,104	7,126	3,672
Farming Segment | Wine grapes
Revenue from External Customer [Line Items]
Commercial/industrial revenues	1,483	2,161	1,483	2,161
Farming Segment | Other
Revenue from External Customer [Line Items]
Commercial/industrial revenues	$ 550	$ 423	$ 1,029	$ 997