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Reporting Segments and Related Information - Revenue Components of Farming Segments (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Revenue from External Customer [Line Items] |  |  |
Segment revenues | $ 35,657 | $ 45,577 | $ 51,147
Operating Segments |  |  |
Revenue from External Customer [Line Items] |  |  |
Segment revenues | 35,657 | 45,577 | 51,147
Operating Segments | Farming segment |  |  |
Revenue from External Customer [Line Items] |  |  |
Segment revenues | 16,434 | 18,648 | 23,836
Operating Segments | Farming segment | Almonds |  |  |
Revenue from External Customer [Line Items] |  |  |
Segment revenues | 6,327 | 7,373 | 12,238
Operating Segments | Farming segment | Pistachios |  |  |
Revenue from External Customer [Line Items] |  |  |
Segment revenues | 4,523 | 6,199 | 6,425
Operating Segments | Farming segment | Wine grapes |  |  |
Revenue from External Customer [Line Items] |  |  |
Segment revenues | 4,131 | 3,744 | 4,338
Operating Segments | Farming segment | Hay |  |  |
Revenue from External Customer [Line Items] |  |  |
Segment revenues | 456 | 520 | 749
Operating Segments | Farming segment | Total crop proceeds |  |  |
Revenue from External Customer [Line Items] |  |  |
Segment revenues | 15,437 | 17,836 | 23,750
Operating Segments | Farming segment | Other farming revenues |  |  |
Revenue from External Customer [Line Items] |  |  |
Segment revenues | $ 997 | $ 812 | $ 86

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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