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Earnings per share (Tables)
 6 Months Ended
May 31, 2023
Earnings Per Share [Abstract]  
Schedule of Calculation of Basic and Diluted Earnings Per Share The following table sets forth the calculation of basic and diluted earnings per share on an interim basis (in thousands, except per share data):
 Three Months EndedSix Months Ended
 May 31, 2023May 31, 2022May 31, 2023May 31, 2022
Net income$12,090 $29,110 $35,764 $49,564 
Weighted average shares outstanding43,343 43,575 43,321 43,778 
Basic earnings per common share$0.28 $0.67 $0.83 $1.13 
Diluted earnings per common share:
Net income$12,090 $29,110 $35,764 $49,564 
Weighted average shares outstanding43,343 43,575 43,321 43,778 
Effect of dilution from common stock equivalents1,127 678 1,090 702 
Diluted weighted average shares outstanding44,470 44,253 44,411 44,480 
Diluted earnings per share$0.27 $0.66 $0.81 $1.11