XML 77 R63.htm IDEA: XBRL DOCUMENT v3.19.1
Summary of Stock Appreciation Right Activity (Detail) - Stock Appreciation Rights (SARs) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jan. 31, 2019
Jan. 31, 2018
Jan. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards outstanding at beginning of year, Shares 214,975    
Granted, Shares 0 0 0
Exercised, Shares (197,600)    
Forfeited or Expired, Shares (7,375)    
Awards outstanding at end of year, Shares 10,000 214,975  
Awards outstanding fully vested and expected to vest, Shares 10,000    
Awards outstanding at end of year, Shares 10,000    
Awards outstanding at beginning of year, Weighted Average Exercise Price $ 32.69    
Granted, Weighted Average Exercise Price 0    
Exercised, Weighted Average Exercise Price 32.45    
Forfeited or Expired, Weighted Average Exercise Price 32.80    
Awards outstanding at end of year, Weighted Average Exercise Price 37.34 $ 32.69  
Awards outstanding fully vested and expected to vest, Weighted Average Exercise Price 37.34    
Awards exercisable at end of year, Weighted Average Exercise Price $ 37.34    
Awards outstanding at end of year, Weighted Average Remaining Contractual Term (years) 1 year 8 months 12 days 1 year 7 months 6 days  
Awards outstanding fully vested and expected to vest, Weighted Average Remaining Contractual Term (years) 1 year 8 months 12 days    
Awards exercisable at end of year, Weighted Average Remaining Contractual Term (years) 1 year 8 months 12 days    
Awards outstanding, Aggregate Intrinsic Value   $ 493