Stock Plans (Schedule of Stock Option Plans) (Details) - Stock Options [Member] - USD ($)	12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Number of Shares:
Outstanding at October 31, 2014	1,323,936
Granted	143,434
Exercised	367,553
Forfeited or expired	9,286
Outstanding at October 31, 2015	1,090,531	1,323,936
Vested and exercisable at October 31, 2015	693,968
Weighted-Average Exercise Price Per Share:
Outstanding at October 31, 2014	$ 63.32
Granted	162.34
Exercised	52.20
Forfeited or expired	91.67
Outstanding at October 31, 2015	79.85	$ 63.32
Vested and exercisable at October 31, 2015	$ 55.21
Outstanding at October 31, 2015, Weighted Average Remaining Contractual Term (in years)	5 years 292 days
Vested and exercisable at October 31, 2015, Weighted Average Remaining Contractual Term (in years)	4 years 215 days
Vested and exercisable at October 31, 2015, Aggregate Intrinsic Value	$ 67,417,316
2006 Directors Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of options granted	$ 48.53	44.20
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	1 year
2007 LTIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of options granted	$ 48.70	$ 41.73
2007 LTIP [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
2007 LTIP [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	5 years