Capital Shares - Additional Information (Detail) (USD $)	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Equity [Line Items]
Convertible preferred shares, authorized	10,000,000us-gaap_PreferredStockSharesAuthorized	10,000,000us-gaap_PreferredStockSharesAuthorized
Convertible preferred shares, No par value
Common shares, authorized	160,000,000us-gaap_CommonStockSharesAuthorized	160,000,000us-gaap_CommonStockSharesAuthorized
Common shares, No par value
Common shares, issued	98,023,000us-gaap_CommonStockSharesIssued	98,023,000us-gaap_CommonStockSharesIssued
Common Shares Outstanding	62,435,000us-gaap_CommonStockSharesOutstanding	64,218,000us-gaap_CommonStockSharesOutstanding
Preferred Class A [Member]
Equity [Line Items]
Convertible preferred shares, authorized	10,000,000
Convertible preferred shares, No par value
Convertible preference shares outstanding	0	0	0

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Face amount per share of no-par value common stock.

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-Name Regulation S-X (SX)

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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

+ References

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

+ References

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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Face amount per share of no-par value preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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-Publisher FASB

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

+ References

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