XML 53 R41.htm IDEA: XBRL DOCUMENT v3.10.0.1
STOCK-BASED COMPENSATION - Summary of Activity under Company's Stock Option Plans (Details) - $ / shares
shares in Thousands
 9 Months Ended
Jan. 31, 2018
Jan. 31, 2017
Oct. 31, 2018
Oct. 31, 2017
STOCK-BASED COMPENSATION        
Shares, Outstanding, Beginning balance     889 707
Shares, Granted     192 125
Shares, Exercised     (3) (90)
Shares, Forfeited       (10)
Shares, Outstanding, Ending balance 889 707 1,078 732
Shares, Exercisable     709 452
Weighted Average Exercise Price, Outstanding, Beginning balance     $ 44.83 $ 39.04
Weighted Average Exercise Price, Granted     40.32 63.58
Weighted Average Exercise Price, Exercised     17.33 30.74
Weighted Average Exercise Price, Forfeited       71.75
Weighted Average Exercise Price, Outstanding, Ending balance $ 44.83 $ 39.04 44.11 43.81
Weighted Average Exercise Price, Exercisable     $ 44.57 $ 28.75
Weighted Average Remaining Term (Years), Outstanding 7 years 10 months 28 days 7 years 9 months 26 days 7 years 7 months 17 days 7 years 7 months 2 days
Weighted Average Remaining Term (Years), Exercisable     6 years 8 months 9 days 6 years 6 months 7 days
Weighted Average Fair Value, Outstanding $ 11.74 $ 10.22 $ 11.33 $ 11.61
Weighted Average Fair Value, Exercisable     $ 11.77 $ 7.76