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Net Income Per Share (Tables)
9 Months Ended
Jun. 30, 2022
Net Income Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share data):
 Three months ended
June 30,
Nine months ended
June 30,
 2022202120222021
Numerator
Net income$83,019 $89,604 $232,814 $220,523 
Denominator
Weighted average shares outstanding — basic59,965 60,186 60,450 60,768 
Dilutive effect of common shares from stock options and restricted stock units
495 1,165 895 1,296 
Weighted average shares outstanding — diluted60,460 61,351 61,345 62,064 
Basic net income per share$1.38 $1.49 $3.85 $3.63 
Diluted net income per share$1.37 $1.46 $3.80 $3.55