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Stock Compensation Plans: Stock Options by Exercise Price (Details) - Stock Options shares in Thousands | 6 Months Ended
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Mar. 31, 2023 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options Outstanding, Number (shares) | shares | 392,270
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 23.50
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 6 years 3 months 18 days
Options Exercisable, Number (shares) | shares | 202,360
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 21.35
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 4 years 4 months 24 days
$9.00 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Weighted Average Exercise Price, minimum (dollars per share) | $ 9
Options Outstanding, Number (shares) | shares | 14,000
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 9.00
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 7 months 6 days
Options Exercisable, Number (shares) | shares | 14,000
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 9.00
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 7 months 6 days
$10.26 - $10.71 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Weighted Average Exercise Price, minimum (dollars per share) | $ 10.26
Weighted Average Exercise Price, maximum (dollars per share) | $ 10.71
Options Outstanding, Number (shares) | shares | 45,000
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 10.55
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 1 year 10 months 24 days
Options Exercisable, Number (shares) | shares | 45,000
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 10.55
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 1 year 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 | 75,500
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 16.54
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 6 years 3 months 18 days
Options Exercisable, Number (shares) | shares | 38,810
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 16.19
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 5 years 2 months 12 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 | 108,820
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 27.31
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 8 years 6 months
Options Exercisable, Number (shares) | shares | 20,740
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 27.14
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 6 years 6 months
$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 | 113,150
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 28.78
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 7 years
Options Exercisable, Number (shares) | shares | 55,950
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 29.35
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 5 years 4 months 24 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 | 35,800
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 31.84
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 5 years 7 months 6 days
Options Exercisable, Number (shares) | shares | 27,860
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 31.80
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 5 years 6 months

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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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