Quarterly Financial Data (Unaudited) - Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Sales	$ 573,938	$ 589,438	$ 496,137	$ 407,470	$ 509,283	$ 489,899	$ 437,592	$ 372,220	$ 2,066,982	$ 1,808,994	$ 1,688,666
Gross margin	312,088	326,265	275,512	225,138	274,967	273,220	248,405	196,907
Net income	$ 79,835	$ 101,456	$ 64,523	$ 49,988	$ 75,867	$ 84,214	$ 70,601	$ 41,161	$ 295,802	$ 271,843	$ 211,111
Earnings per share:
Basic	$ 1.38	$ 1.76	$ 1.12	$ 0.87	$ 1.33	$ 1.48	$ 1.24	$ 0.72	$ 5.14	$ 4.76	$ 3.48
Diluted	$ 1.37	$ 1.74	$ 1.11	$ 0.86	$ 1.31	$ 1.46	$ 1.23	$ 0.72	$ 5.08	$ 4.73	$ 3.45