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Stock Compensation Plans: Stock Options by Exercise Price (Details) - Stock Options | 12 Months Ended
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Sep. 30, 2023 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options Outstanding, Number (in shares) | shares | 369,150
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 24.00
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 6 years
Options Exercisable, Number (in shares) | shares | 239,030
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 23.03
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 4 years 10 months 24 days
9.00 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price range, lower range limit (in dollars per share) | $ 9
Options Outstanding, Number (in shares) | shares | 3,000
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 9.00
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 1 month 6 days
Options Exercisable, Number (in shares) | shares | 3,000
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 9.00
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 1 month 6 days
10.26 - 10.71 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price range, lower range limit (in dollars per share) | $ 10.26
Exercise price range, upper range limit (in dollars per share) | $ 10.71
Options Outstanding, Number (in shares) | shares | 43,250
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 10.55
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 1 year 4 months 24 days
Options Exercisable, Number (in shares) | shares | 43,250
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 10.55
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 1 year 4 months 24 days
15.67 - 19.13 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price range, lower range limit (in dollars per share) | $ 15.67
Exercise price range, upper range limit (in dollars per share) | $ 19.13
Options Outstanding, Number (in shares) | shares | 70,770
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 16.54
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 5 years 9 months 18 days
Options Exercisable, Number (in shares) | shares | 47,110
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 16.34
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 5 years 2 months 12 days
26.50 - 27.14 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price range, lower range limit (in dollars per share) | $ 26.5
Exercise price range, upper range limit (in dollars per share) | $ 27.40
Options Outstanding, Number (in shares) | shares | 106,660
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 27.32
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 8 years
Options Exercisable, Number (in shares) | shares | 42,600
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 27.23
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 7 years 1 month 6 days
28.23 - 29.69 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price range, lower range limit (in dollars per share) | $ 28.23
Exercise price range, upper range limit (in dollars per share) | $ 29.69
Options Outstanding, Number (in shares) | shares | 110,750
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 28.78
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 6 years 6 months
Options Exercisable, Number (in shares) | shares | 69,350
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 29.11
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 5 years 7 months 6 days
31.80 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price range, lower range limit (in dollars per share) | $ 31.8
Options Outstanding, Number (in shares) | shares | 34,720
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 31.85
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 5 years 1 month 6 days
Options Exercisable, Number (in shares) | shares | 33,720
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 31.80
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 5 years

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