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Stock-Based Compensation (Tables)
 6 Months Ended
Apr. 30, 2015
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 six months ended April 30, 2015:

 

 

 

Number of

Options

 

 

Weighted-Average

Exercise Price Per

Share

 

 

Aggregate

Intrinsic Value

 

 

Weighted

Average

Remaining

Term

Outstanding at October 31, 2014

 

 

1,686

 

 

$

42.77

 

 

 

 

 

 

 

Granted

 

 

315

 

 

$

79.66

 

 

 

 

 

 

 

Exercised

 

 

(125

)

 

$

28.21

 

 

 

 

 

 

 

Forfeited or expired

 

 

(12

)

 

$

63.77

 

 

 

 

 

 

 

Outstanding at April 30, 2015

 

 

1,864

 

 

$

49.85

 

 

$

55,540

 

 

6.4 years

Vested or expected to vest at April 30, 2015

 

 

1,842

 

 

$

49.54

 

 

$

55,467

 

 

6.3 years

Exercisable at April 30, 2015

 

 

1,125

 

 

$

36.80

 

 

$

48,216

 

 

5.0 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:

 

Three months ended

 

April 30, 2015

 

 

April 30, 2014

Expected volatility

 

31.6%-39.5%

 

 

40.1%-44.7%

Expected dividend yield

 

 

1.10%

 

 

0.98%-1.03%

Risk-free interest rate

 

1.70%-1.85%

 

 

1.51%-1.79%

Expected life of the option (in years)

 

5.4-6.1

 

 

5.4-6.1

 
Summarized Activity Related to Restricted Stock

The following table summarizes activity related to restricted shares during the six months ended April 30, 2015:

 

 

 

Number of Shares

 

 

Weighted-Average

Grant Date Fair

Value

 

Restricted shares at October 31, 2014

 

 

71

 

 

$

63.53

 

Granted

 

 

21

 

 

$

79.53

 

Forfeited

 

 

(2

)

 

$

66.86

 

Vested

 

 

(34

)

 

$

57.23

 

Restricted shares at April 30, 2015

 

 

56

 

 

$

73.35

 

 
Summarized Activity Related to Restricted Stock Units

The following table summarizes activity related to restricted share units during the six months ended April 30, 2015:

 

 

 

Number of Units

 

 

Weighted-Average

Grant Date Fair

Value

 

Restricted share units at October 31, 2014

 

 

5

 

 

$

61.59

 

Granted

 

 

13

 

 

$

76.19

 

Vested

 

 

(5

)

 

$

61.59

 

Restricted share units at April 30, 2015

 

 

13

 

 

$

76.19

 

 
Summarized Activity Related to Director Deferred Compensation Shares

The following table summarizes activity related to director deferred compensation share equivalent units during the six months ended April 30, 2015:

 

 

 

Number of Shares

 

 

Weighted-Average

Grant Date Fair

Value

 

Outstanding at October 31, 2014

 

 

110

 

 

$

29.74

 

Restricted share units vested

 

 

5

 

 

$

61.59

 

Dividend equivalents

 

 

1

 

 

$

74.21

 

Distributions

 

 

(15

)

 

$

21.35

 

Outstanding at April 30, 2015

 

 

101

 

 

$

32.91