v3.26.1
Stock Compensation Plans: Stock Options by Exercise Price (Details) - Stock Options
shares in Thousands
 9 Months Ended
Jun. 30, 2026
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Options Outstanding, Number (shares) | shares 152,050
Options Outstanding, Weighed Average Exercise Price (dollars per share) $ 26.35
Options Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 4 months 24 days
Options Exercisable, Number (shares) | shares 118,850
Options Exercisable, Weighted Average Exercise Price (dollars per share) $ 25.96
Options Exercisable, Weighted Average Remaining Contractual Life (Years) 3 years 10 months 24 days
$15.67 - $19.13  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Weighted Average Exercise Price, minimum (dollars per share) $ 15.67
Weighted Average Exercise Price, maximum (dollars per share) $ 19.13
Options Outstanding, Number (shares) | shares 27,150
Options Outstanding, Weighed Average Exercise Price (dollars per share) $ 16.60
Options Outstanding, Weighted Average Remaining Contractual Life (Years) 3 years 3 months 18 days
Options Exercisable, Number (shares) | shares 27,150
Options Exercisable, Weighted Average Exercise Price (dollars per share) $ 16.60
Options Exercisable, Weighted Average Remaining Contractual Life (Years) 3 years 3 months 18 days
$26.50 - $27.25  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Weighted Average Exercise Price, minimum (dollars per share) $ 26.5
Weighted Average Exercise Price, maximum (dollars per share) $ 27.4
Options Outstanding, Number (shares) | shares 57,525
Options Outstanding, Weighed Average Exercise Price (dollars per share) $ 27.34
Options Outstanding, Weighted Average Remaining Contractual Life (Years) 5 years 7 months 6 days
Options Exercisable, Number (shares) | shares 35,325
Options Exercisable, Weighted Average Exercise Price (dollars per share) $ 27.30
Options Exercisable, Weighted Average Remaining Contractual Life (Years) 5 years 1 month 6 days
$28.23 - $29.69  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Weighted Average Exercise Price, minimum (dollars per share) $ 28.23
Weighted Average Exercise Price, maximum (dollars per share) $ 29.69
Options Outstanding, Number (shares) | shares 50,850
Options Outstanding, Weighed Average Exercise Price (dollars per share) $ 28.64
Options Outstanding, Weighted Average Remaining Contractual Life (Years) 4 years 1 month 6 days
Options Exercisable, Number (shares) | shares 40,250
Options Exercisable, Weighted Average Exercise Price (dollars per share) $ 28.75
Options Exercisable, Weighted Average Remaining Contractual Life (Years) 3 years 9 months 18 days
$31.80  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Weighted Average Exercise Price, minimum (dollars per share) $ 31.8
Weighted Average Exercise Price, maximum (dollars per share) $ 33.4
Options Outstanding, Number (shares) | shares 16,525
Options Outstanding, Weighed Average Exercise Price (dollars per share) $ 31.90
Options Outstanding, Weighted Average Remaining Contractual Life (Years) 2 years 6 months
Options Exercisable, Number (shares) | shares 16,125
Options Exercisable, Weighted Average Exercise Price (dollars per share) $ 31.86
Options Exercisable, Weighted Average Remaining Contractual Life (Years) 2 years 4 months 24 days