v3.26.1
Earnings 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 for diluted and basic earnings per share:        
Net income $ 237,172 $ 181,789 $ 660,003 $ 496,932
Denominator — share:        
Basic weighted-average shares (in shares) 22,670 24,284 23,341 24,350
Effect of dilutive securities (in shares) 33 291 129 346
Diluted weighted-average shares (in shares) 22,703 24,575 23,470 24,696
Earnings per share:        
Basic (in dollars per share) $ 10.46 $ 7.49 $ 28.28 $ 20.41
Diluted (in dollars per share) $ 10.45 $ 7.40 $ 28.12 $ 20.12