Calculations of Basic and Diluted Net Income Per Common Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Net income	$ 13,069	$ 13,382
Weighted-average common and common equivalent shares outstanding-Basic	55,662	54,525
Effect of dilutive securities:
Weighted-average common and common equivalent shares outstanding-Diluted	57,065	55,497
Net income per common share
Basic	$ 0.23	$ 0.25
Diluted	$ 0.23	$ 0.24
RSUs
Effect of dilutive securities:
Effect of dilutive securities	525	422
Performance shares
Effect of dilutive securities:
Effect of dilutive securities	472	353
Stock options
Effect of dilutive securities:
Effect of dilutive securities	406	197