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Quarterly Financial Data (Unaudited) - Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Sales	$ 585,451	$ 559,746	$ 551,119	$ 497,910	$ 569,295	$ 581,243	$ 553,706	$ 550,424	$ 2,194,226	$ 2,254,668	$ 2,066,982
Gross margin	318,975	302,623	301,529	268,976	307,864	320,476	307,015	300,973
Net income	$ 102,673	$ 93,928	$ 91,923	$ 48,567	$ 86,702	$ 94,884	$ 91,235	$ 104,555	$ 337,091	$ 377,375	$ 295,802
Earnings per share:
Basic	$ 1.79	$ 1.64	$ 1.60	$ 0.84	$ 1.49	$ 1.63	$ 1.57	$ 1.81	$ 5.87	$ 6.51	$ 5.14
Diluted	$ 1.76	$ 1.62	$ 1.58	$ 0.83	$ 1.47	$ 1.61	$ 1.55	$ 1.78	$ 5.79	$ 6.40	$ 5.08

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