Quarterly Financial Data (Unaudited) - Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Sales	$ 509,283	$ 489,899	$ 437,592	$ 372,220	$ 446,200	$ 462,731	$ 400,727	$ 379,008	$ 1,808,994	$ 1,688,666	$ 1,704,021
Gross margin	274,967	273,220	248,405	196,907	234,861	248,492	221,890	208,721
Net income	$ 75,867	$ 84,214	$ 70,601	$ 41,161	$ 49,624	$ 69,388	$ 49,214	$ 42,885	$ 271,843	$ 211,111	$ 246,773
Earnings per share:
Basic	$ 1.33	$ 1.48	$ 1.24	$ 0.72	$ 0.84	$ 1.15	$ 0.81	$ 0.69	$ 4.76	$ 3.48	$ 3.88
Diluted	$ 1.31	$ 1.46	$ 1.23	$ 0.72	$ 0.84	$ 1.14	$ 0.80	$ 0.69	$ 4.73	$ 3.45	$ 3.84