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Stock-Based Compensation (Tables) | 9 Months Ended
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Jul. 31, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Summarized Activity Related to Stock Options | The following table summarizes activity related to stock options for the nine months ended July 31, 2016:
|  | Number of Options |  |  | Weighted-Average Exercise Price Per Share |  |  | Aggregate Intrinsic Value |  |  | Weighted Average Remaining Term
Outstanding at October 31, 2015 |  |  | 1,759 |  |  | $ | 50.74 |  |  |  |  |  |  |
Granted |  |  | 490 |  |  | $ | 70.91 |  |  |  |  |  |  |
Exercised |  |  | (225 | ) |  | $ | 35.84 |  |  |  |  |  |  |
Forfeited or expired |  |  | (36 | ) |  | $ | 69.22 |  |  |  |  |  |  |
Outstanding at July 31, 2016 |  |  | 1,988 |  |  | $ | 57.08 |  |  | $ | 62,066 |  |  | 6.5 years
Vested or expected to vest at July 31, 2016 |  |  | 1,964 |  |  | $ | 56.89 |  |  | $ | 61,685 |  |  | 6.4 years
Exercisable at July 31, 2016 |  |  | 1,104 |  |  | $ | 44.71 |  |  | $ | 48,107 |  |  | 4.8 years
Fair Value Assumptions of Stock Options | The fair value of each option grant was estimated at the date of grant using the Black-Scholes option-pricing model with the following assumptions:
Nine months ended |  | July 31, 2016 |  |  | July 31, 2015
Expected volatility |  | 29.1%-30.4% |  |  | 30.3%-39.5%
Expected dividend yield |  |  | 1.54% |  |  | 1.06%-1.10%
Risk-free interest rate |  | 1.78%-1.90% |  |  | 1.57%-1.85%
Expected life of the option (in years) |  | 5.4-6.2 |  |  | 5.4-6.1
Summarized Activity Related to Restricted Stock | The following table summarizes activity related to restricted shares during the nine months ended July 31, 2016:
|  | Number of Shares |  |  | Weighted-Average Grant Date Fair Value |
Restricted shares at October 31, 2015 |  |  | 53 |  |  | $ | 73.23 |
Granted |  |  | 30 |  |  | $ | 70.80 |
Vested |  |  | (23 | ) |  | $ | 69.17 |
Restricted shares at July 31, 2016 |  |  | 60 |  |  | $ | 73.56 |
Summarized Activity Related to Restricted Stock Units | The following table summarizes activity related to restricted share units during the nine months ended July 31, 2016:
|  | Number of Units |  |  | Weighted-Average Grant Date Fair Value |
Restricted share units at October 31, 2015 |  |  | 0 |  |  | $ | — |
Granted |  |  | 13 |  |  | $ | 72.01 |
Restricted share units at July 31, 2016 |  |  | 13 |  |  | $ | 72.01 |
Summarized Activity Related to Director Deferred Compensation Shares | The following table summarizes activity related to director deferred compensation share equivalent units during the nine months ended July 31, 2016:
|  | Number of Shares |  |  | Weighted-Average Grant Date Fair Value |
Outstanding at October 31, 2015 |  |  | 100 |  |  | $ | 36.76 |
Deferrals |  |  | 1 |  |  | $ | 73.34 |
Dividend equivalents |  |  | 1 |  |  | $ | 72.30 |
Distributions |  |  | (8 | ) |  | $ | 26.25 |
Outstanding at July 31, 2016 |  |  | 94 |  |  | $ | 38.28 |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock awards granted to nonemployee directors that were outstanding at the beginning and end of the year, and the number of awards that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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