Common Stock Repurchases (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Equity, Class of Treasury Stock [Line Items]
Purchase of common stock (in shares)	823,385
Average cost (in usd per share)	$ 101.37
Purchase of common stock		$ 83,463
Paid-In Capital
Equity, Class of Treasury Stock [Line Items]
Purchase of common stock	$ 59,600	59,639
Retained Earnings
Equity, Class of Treasury Stock [Line Items]
Purchase of common stock	$ 23,000	$ 23,001