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Fair value measurements (Details Textual) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012	Apr. 10, 2013	Oct. 31, 2012
Fair value measurements (Additional Textual) [Abstract]
Total revalue adjustment of contingent considerations	$ 0.4		$ 1.8
Limoneira [Member]
Fair value measurements (Textual) [Abstract]
Percentage of outstanding shares of Limoneira's shares owned	15.00%		15.00%
Limoneira's stock price	$ 22.44		$ 22.44		$ 29.02	$ 22.47
Unrealized investment holding gains (losses)	6.6	1.9	0.1	1.0
RFG contingent consideration [Member]
Fair value measurements (Textual) [Abstract]
Cash payment required to be made for second business acquisition	5		5
Revenue adjustment for second business acquisition	0.4
Additional paid in capital for second business acquisition			$ 4.2

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- Definition

Business combination contingent consideration potential cash payment.

+ References

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- Definition

Revenue adjustment for second business acquisition.

+ References

No definition available.

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- Definition

Amount of (increase) decrease in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 4

-Subparagraph (a)(1)

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

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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

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Amount of increase in noncontrolling interest from subsidiary issuance of equity interests to noncontrolling interest holders.

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- Definition

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

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

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