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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 | 6 Months Ended |
--- | --- | --- | ---
Apr. 30, 2017 | Apr. 30, 2016 | Apr. 30, 2017 | Apr. 30, 2016 | Oct. 31, 2016
Assets at Fair Value: |  |  |  |  |
Unrealized Gain (Loss) on Investments |  |  | $ (1,711) | $ (3,509) |
Limoneira |  |  |  |  |
Assets at Fair Value: |  |  |  |  |
Percentage of outstanding shares of Limoneira's shares owned | 12.00% |  | 12.00% |  |
Limoneira's stock price | $ 20.68 |  | $ 20.68 |  | $ 19.69
Unrealized investment holding income (losses) | $ 6,400 | $ 9,200 | $ 1,700 | $ 3,500 |
Fair Value, Measurements, Recurring [Member] |  |  |  |  |
Assets at Fair Value: |  |  |  |  |
Total assets at fair value | 35,747 |  | 35,747 |  |
Fair Value, Measurements, Recurring [Member] | Limoneira |  |  |  |  |
Assets at Fair Value: |  |  |  |  |
Total assets at fair value | 35,747 |  | 35,747 |  |
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] |  |  |  |  |
Assets at Fair Value: |  |  |  |  |
Total assets at fair value | 35,747 |  | 35,747 |  |
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Limoneira |  |  |  |  |
Assets at Fair Value: |  |  |  |  |
Total assets at fair value | $ 35,747 |  | $ 35,747 |  |

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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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