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Earnings Per Share - Summarization of Company's Class A and Class B Common and Treasury Shares (Detail) - shares | Oct. 31, 2017 | Oct. 31, 2016
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Class A Common Stock |  |
Class of Stock [Line Items] |  |
Common stock shares authorized (shares) | 128,000,000 | 128,000,000
Issued Shares (shares) | 42,281,920 | 42,281,920
Outstanding Shares (shares) | 25,835,281 | 25,781,791
Treasury Shares (shares) | 16,446,639 | 16,500,129
Class B Common Stock |  |
Class of Stock [Line Items] |  |
Common stock shares authorized (shares) | 69,120,000 | 69,120,000
Issued Shares (shares) | 34,560,000 | 34,560,000
Outstanding Shares (shares) | 22,007,725 | 22,009,725
Treasury Shares (shares) | 12,552,275 | 12,550,275

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- Definition 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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