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Fair Value Measurements - Financial Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended |
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Jul. 31, 2016 | Jul. 31, 2015 | Jul. 31, 2016 | Jul. 31, 2015 | Oct. 31, 2015
Limoneira |  |  |  |  |
Assets at Fair Value: |  |  |  |  |
Percentage of outstanding shares of Limoneira's shares owned | 12.00% |  | 12.00% |  |
Limoneira's stock price | $ 17.69 |  | $ 17.69 |  | $ 15.86
Unrealized investment holding income (losses) | $ 300 | $ 4,100 | $ 3,200 | $ 8,800 |
Fair Value, Measurements, Recurring [Member] |  |  |  |  |
Assets at Fair Value: |  |  |  |  |
Total assets at fair value | 30,578 |  | 30,578 |  |
Fair Value, Measurements, Recurring [Member] | Limoneira |  |  |  |  |
Assets at Fair Value: |  |  |  |  |
Total assets at fair value | 30,578 |  | 30,578 |  |
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] |  |  |  |  |
Assets at Fair Value: |  |  |  |  |
Total assets at fair value | 30,578 |  | 30,578 |  |
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Limoneira |  |  |  |  |
Assets at Fair Value: |  |  |  |  |
Total assets at fair value | $ 30,578 |  | $ 30,578 |  |

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition The aggregate net change in the difference between the fair value and the carrying value, or in the comparative fair values, of marketable securities categorized as trading held at each balance sheet date, that was included in earnings for the period, which may have arisen from (a) securities classified as trading, (b) the unrealized holding gain (loss) on held-to-maturity securities transferred to the trading security category, and (c) the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) on available-for-sale securities transferred to trading securities during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27405-111563 + Details
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