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Stock-Based Compensation (Summary of Stock Option Activity) (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Nov. 30, 2018
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Beginning balance (in shares) | shares 1,002
Granted (in shares) | shares 482
Exercised (in shares) | shares (189)
Canceled (in shares) | shares (188)
Ending balance (in shares) | shares 1,107
Exercisable (in shares) | shares 269
Vested or expected to vest (in shares) | shares 1,107
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]  
Options outstanding, weighted average exercise price, beginning of year (in dollars per share) $ 28.29
Granted, weighted average exercise price (in dollars per share) 49.56
Exercised, weighted average exercise price (in dollars per share) 23.40
Canceled, weighted average exercise price (in dollars per share) 34.38
Options outstanding, weighted average exercise price, end of year (in dollars per share) 37.82
Exercisable, weighted average exercise price (in dollars per share) 33.80
Vested or expected to vest, weighted average exercise price (in dollars per share) $ 37.82
Options Outstanding, weighted average remaining contractual term (in years) 5 years 7 months 10 days
Exercisable, weighted average remaining contractual term (in years) 5 years 3 months 29 days
Vested or expected to vest, weighted average remaining contractual term (in years) 5 years 7 months 10 days
Options outstanding, aggregate intrinsic value | $ $ 3,610
Exercisable, aggregate intrinsic value | $ 1,206
Vested or expected to vest, aggregate intrinsic value | $ $ 3,610
Share price (in dollars per share) $ 35.16