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Fair Value Measurements (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Oct. 31, 2017
Assets at Fair Value:
Unrealized Gain (Loss) on Investments	$ 6,758	$ 5,307
Limoneira [Member]
Assets at Fair Value:
Percentage of outstanding shares of Limoneira's shares owned	10.00%
Limoneira's stock price	$ 27.26		$ 23.35
Fair Value, Measurements, Recurring [Member]
Assets at Fair Value:
Total assets at fair value	$ 47,121
Fair Value, Measurements, Recurring [Member] | Limoneira [Member]
Assets at Fair Value:
Total assets at fair value	47,121
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Assets at Fair Value:
Total assets at fair value	47,121
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Limoneira [Member]
Assets at Fair Value:
Total assets at fair value	$ 47,121

X

- 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=66048111&loc=d3e19207-110258

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

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- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

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- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of investments, not including unrealized gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, held at each balance sheet date and included in earnings for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

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