Stock Repurchase Program - Stock Repurchase Activities (Detail) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Jul. 31, 2020
Jul. 31, 2019
 [1]
Jul. 31, 2020
 [2]
Jul. 31, 2019
 [1],[3]
Stock Repurchase Program [Abstract]        
Purchases of treasury stock (in shares) 149 775 1,380 1,901
Aggregate purchased shares $ 20,000 $ 100,000 $ 200,000 $ 209,185
Reissuance of treasury stock 999 1,166 2,807 3,009
[1] Does not include the 90,202 shares or $20.0 million equity forward contract from the June 2019 ASR settled in August 2019.
[2] The third quarter of fiscal 2020 includes the settlement of the 148,953 shares or $20.0 million equity forward contract from the February 2020 ASR settled in May 2020.
[3] The third quarter of fiscal 2019 includes the settlement of the 97,601 shares or $20.0 million equity forward contract from the February 2019 ASR settled in May 2019.