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Stock-Based Compensation (Tables)
 9 Months Ended
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