v3.26.1
Net Income Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Numerator        
Net income $ 208,208 $ 189,912 $ 536,017 $ 501,887
Denominator        
Weighted average shares outstanding — basic (shares) 56,726 57,772 57,031 57,989
Dilutive effect of common shares from stock options and restricted stock units 824 720 643 784
Weighted average shares outstanding — diluted (shares) 57,550 58,492 57,674 58,773
Basic net income per share (dollars per share) $ 3.67 $ 3.29 $ 9.40 $ 8.65
Diluted net income per share (dollars per share) $ 3.62 $ 3.25 $ 9.29 $ 8.54