Quarterly Financial Data (Unaudited) - Quarterly Financial Data (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Sales	$ 468,590	$ 458,550	$ 417,461	$ 359,420	$ 410,818	$ 402,960	$ 382,100	$ 347,043	$ 1,704,021	$ 1,542,921	$ 1,409,578
Gross margin	257,253	257,511	235,552	194,782	226,894	225,083	216,938	197,229
Net income	$ 72,080	$ 77,879	$ 61,934	$ 34,880	$ 59,777	$ 65,424	$ 54,605	$ 42,011	$ 246,773	$ 221,817	$ 224,829
Earnings per share:
Basic	$ 1.14	$ 1.23	$ 0.97	$ 0.54	$ 0.93	$ 1.02	$ 0.85	$ 0.65	$ 3.88	$ 3.45	$ 3.49
Diluted	$ 1.13	$ 1.21	$ 0.96	$ 0.54	$ 0.92	$ 1.01	$ 0.84	$ 0.65	$ 3.84	$ 3.42	$ 3.45