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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, 2021 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options Outstanding, Number (shares) | shares | 338,765
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 19.71
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 6 years 6 months
Options Exercisable, Number (shares) | shares | 180,373
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 16.83
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 4 years 10 months 24 days
$5.86 - $6.00 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Weighted Average Exercise Price, minimum (dollars per share) | $ 5.86
Weighted Average Exercise Price, maximum (dollars per share) | $ 6.00
Options Outstanding, Number (shares) | shares | 4,200
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 5.93
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 1 year 6 months
Options Exercisable, Number (shares) | shares | 4,200
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 5.93
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 1 year 6 months
$9.00 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Weighted Average Exercise Price, minimum (dollars per share) | $ 9.00
Options Outstanding, Number (shares) | shares | 30,000
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 9.00
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 2 years 7 months 6 days
Options Exercisable, Number (shares) | shares | 30,000
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 9.00
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 2 years 7 months 6 days
$10.26 - $10.74 |
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 | 65,575
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 10.57
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 4 years
Options Exercisable, Number (shares) | shares | 65,575
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 10.57
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 4 years
$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 | 104,500
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 16.50
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 8 years 2 months 12 days
Options Exercisable, Number (shares) | shares | 25,400
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 15.67
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 5 years 6 months
$26.50 - $27.14 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Weighted Average Exercise Price, minimum (dollars per share) | $ 26.50
Weighted Average Exercise Price, maximum (dollars per share) | $ 27.14
Options Outstanding, Number (shares) | shares | 43,990
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 27.13
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 8 years 6 months
Options Exercisable, Number (shares) | shares | 8,798
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 27.13
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 8 years 6 months
$29.69 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Weighted Average Exercise Price, minimum (dollars per share) | $ 29.69
Options Outstanding, Number (shares) | shares | 50,400
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 29.69
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 6 years 6 months
Options Exercisable, Number (shares) | shares | 30,300
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 29.69
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 6 years 6 months
$31.80 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Weighted Average Exercise Price, minimum (dollars per share) | $ 31.80
Options Outstanding, Number (shares) | shares | 40,100
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 31.80
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 7 years 6 months
Options Exercisable, Number (shares) | shares | 16,100
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 31.80
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 7 years 6 months

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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=116856206&loc=d3e5070-113901 + Details
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