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Stock-Based Compensation and Shareholders' Equity (Tables)
 9 Months Ended
Jul. 31, 2021
Share-based Payment Arrangement [Abstract]  
Summary of the activity under the company's stock option plans
A summary of the Company’s stock option activity as of July 31, 2021 and changes during the nine-month period then ended is presented below:
Options
Outstanding
(in thousands)
Weighted-
Average Exercise
Price Per Share
Weighted-
Average
Remaining
Contractual
Term in Years
Aggregate
Intrinsic
Value
Options outstanding at October 31, 20204,192 $70.73 
Options granted644 $145.04 
Options exercised(875)$63.18 
Options forfeited(36)$87.18 
Options expired(6)$40.69 
Options outstanding at July 31, 20213,919 $84.53 5.7$324,862 
Options exercisable at July 31, 20212,511 $66.15 4.3$254,262 
Options vested or expected to vest at July 31, 2021 (1)3,816 $83.41 5.7$320,532 
(1) In addition to the vested options, the Company expects a portion of the unvested options to vest at some point in the future. The number of options expected to vest is calculated by applying an estimated forfeiture rate to the unvested options.
Schedule of share-based compensation, restricted stock units award activity A summary of the Company’s restricted stock unit/award activity as of July 31, 2021 and changes during the nine-month period then ended is presented below:
Restricted
Stock Units/Awards
Outstanding
(in thousands)
Weighted-
Average Grant-
Date Fair Value
Per Share
Restricted stock units/awards outstanding at October 31, 20203,637 $91.54 
Units/Awards granted1,034 $143.88 
Restrictions lapsed(1,160)$89.08 
Forfeited(163)$100.74 
Restricted stock units/awards outstanding at July 31, 20213,348 $107.70 
Schedule of stock-based compensation expense Total stock-based compensation expense recognized was as follows:
Three Months EndedNine Months Ended
July 31, 2021August 1, 2020July 31, 2021August 1, 2020
Cost of sales$4,331 $4,508 $13,338 $13,428 
Research and development19,806 19,158 57,675 55,163 
Selling, marketing, general and administrative17,550 14,951 47,670 43,427 
Special charges, net— 943 — 943 
Total stock-based compensation expense$41,687 $39,560 $118,683 $112,961