Stock-based Compensation - Additional Information (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Oct. 31, 2013 Y	Oct. 31, 2012	Oct. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of common shares available for grant	2,900
Normal retirement age	65
Expense related to director deferred compensation	$ 183	$ 265	$ 265
Periods of performance considered for calculating compensation expense	3 years
Number of common shares reserved for future issuance	2,657
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum rate of stock option, description	Not exceeding 25 percent per year
Maximum rate of stock option	25.00%
Option Expiring period	10 years
Compensation expense recognized	4,906	3,789	2,906
Unrecognized compensation cost related to nonvested common shares	9,631
Weighted average period expected to be amortized, non vested shares	1 year 8 months 12 days
Weighted-average expected volatility used	46.30%	46.20%	44.30%
Weighted average grant date fair value of stock options granted	$ 24.12	$ 17.03	$ 16.80
Total intrinsic value of options exercised	12,892	13,329	23,076
Cash received from the exercise of stock options	6,018	4,934	9,652
Tax benefit realized from tax deductions from exercises of stock options	5,531	4,792	6,924
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to nonvested common shares	1,827
Weighted average period expected to be amortized, non vested shares	1 year 8 months 12 days
Expense related to nonvested common shares	2,464	1,724	1,278
Long Term Incentive Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Periods of performance considered for calculating compensation expense	3 years
Weighted average grant date fair value	$ 59.59	$ 42.12	$ 42.02
Compensation expense charged	3,588	4,235	4,067
Cumulative amount recorded in shareholders' equity related to Long-Term Incentive Plan	$ 8,083	$ 8,707	$ 6,081