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STOCK-BASED COMPENSATION - Summary of Activity under Company's Stock Option Plans (Details) - $ / shares
shares in Thousands
3 Months Ended 12 Months Ended
Apr. 30, 2023
Apr. 30, 2022
Jan. 31, 2023
STOCK-BASED COMPENSATION      
Shares, Outstanding, Beginning balance 1,440    
Shares, Granted 10    
Shares, Exercised (30)    
Shares, Forfeited (1)    
Shares, Outstanding, Ending balance 1,419 1,438 1,440
Shares, Exercisable 1,291 1,199  
Weighted Average Exercise Price, Outstanding, Beginning balance $ 43.84    
Weighted Average Exercise Price, Granted 39.47    
Weighted Average Exercise Price, Exercised 18.12    
Weighted Average Exercise Price, Forfeited 33.81    
Weighted Average Exercise Price, Outstanding, Ending balance 44.36 $ 44.12 $ 43.84
Weighted Average Exercise Price, Exercisable $ 44.80 $ 44.87  
Weighted Average Remaining Term (Years), Outstanding 5 years 4 months 9 days 6 years 14 days 5 years 5 months 15 days
Weighted Average Remaining Term (Years), Exercisable 5 years 7 days 5 years 6 months 7 days  
Weighted Average Fair Value, Outstanding $ 10.23 $ 10.21 $ 10.11
Weighted Average Fair Value, Exercisable $ 10.48 $ 10.76