v3.26.1
Net Income Per Common Share: Schedule of Earnings per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Earnings Per Share, Basic [Abstract]        
Numerator – net income $ 7,720 $ 7,100 $ 23,068 $ 20,715
Denominator – weighted average common shares outstanding (in shares) 7,805,218 7,893,308 7,855,474 7,929,626
Basic net income per common share (in dollars per share) $ 0.99 $ 0.90 $ 2.94 $ 2.61
Earnings Per Share, Diluted [Abstract]        
Effect of dilutive stock options (in shares) 50,189 28,454 44,754 33,786
Weighted average common shares and common stock equivalents (in shares) 7,855,407 7,921,762 7,900,228 7,963,412
Diluted net income per common share (in dollars per share) $ 0.98 $ 0.90 $ 2.92 $ 2.60
Stock Options        
Earnings Per Share, Diluted [Abstract]        
Antidilutive securities excluded from computation of earnings per share (in shares)   137,720 273 120,049