XML 21 R86.htm IDEA: XBRL DOCUMENT v3.20.1
Note 17 - Stock-based Compensation Plans Summary of Performance Share Units Activity (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Jan. 31, 2018
Vested or expected to vest, shares (in shares) 1,127,822    
Vested or expected to vest, weighted-average exercise price (in dollars per share) $ 26.82    
Vested or expected to vest, weighted-average remaining contractual life (Year) 4 years 219 days    
Vested or expected to vest, aggregate intrinsic value $ 20.2    
Performance Shares [Member]      
Number of Units Outstanding (in shares) 530,383 440,520  
Weighted-Average Grant Date Fair Value, PSU (in dollars per share) $ 18.02 $ 15.91  
Weighted-Average Remaining Contractual, PSU (Year) 5 years 5 years 182 days 6 years 36 days
Aggregate Intrinsic Value, PSU $ 28.2 $ 16.6 $ 11.9
Number of PSUs Granted (in shares) 53,729 54,351  
PSUs Granted, Weighted-Average Granted Date Fair Value (in dollars per share) $ 53.65 $ 35.23  
Performance units issued (in shares) 45,762 35,512  
Performance units issued, weighted-average granted date fair value (in dollars per share) $ 23.24 $ 19.59  
Number of Units Outstanding (in shares) 629,874 530,383 440,520
Weighted-Average Grant Date Fair Value, PSU (in dollars per share) $ 21.19 $ 18.02 $ 15.91
Vested or expected to vest, shares (in shares) 629,874    
Vested or expected to vest, weighted-average exercise price (in dollars per share) $ 21.19    
Vested or expected to vest, weighted-average remaining contractual life (Year) 5 years    
Vested or expected to vest, aggregate intrinsic value $ 28.2    
Exercisable, number of units (in shares) 521,794    
Exercisable, PSU weighted-average granted date fair value (in dollars per share) $ 16.45    
Exercisable, Weighted-Average Remaining Contractual, PSU (Year) 4 years 109 days    
Exercisable, Aggregate Intrinsic Value, PSU $ 23.4