Reporting Segments and Related Information - Revenue Components of Farming Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue from External Customer [Line Items]
Segment revenues	$ 45,619	$ 35,255	$ 45,979
Farming segment
Revenue from External Customer [Line Items]
Segment revenues	18,563	16,434	18,648
Farming segment | Almonds
Revenue from External Customer [Line Items]
Segment revenues	5,744	6,327	7,373
Farming segment | Pistachios
Revenue from External Customer [Line Items]
Segment revenues	7,880	4,523	6,199
Farming segment | Wine grapes
Revenue from External Customer [Line Items]
Segment revenues	3,683	4,131	3,744
Farming segment | Hay
Revenue from External Customer [Line Items]
Segment revenues	297	456	520
Farming segment | Total crop proceeds
Revenue from External Customer [Line Items]
Segment revenues	17,604	15,437	17,836
Farming segment | Other farming revenues
Revenue from External Customer [Line Items]
Segment revenues	$ 959	$ 997	$ 812