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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, 2019 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options Outstanding, Number (shares) | shares | 346,504
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 16.59
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 6 years 8 months 3 days
Options Exercisable, Number (shares) | shares | 176,854
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 11.08
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 5 years 5 months 12 days
$4.01 - $4.55 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options Outstanding, Number (shares) | shares | 2,500
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 4.33
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 1 year 5 months
Options Exercisable, Number (shares) | shares | 2,500
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 4.33
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 1 year 5 months
Weighted Average Exercise Price, minimum (dollars per share) | $ 4.01
Weighted Average Exercise Price, maximum (dollars per share) | $ 4.55
$5.86 - $6.00 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options Outstanding, Number (shares) | shares | 24,850
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 5.97
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 3 years 6 months 24 days
Options Exercisable, Number (shares) | shares | 24,850
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 5.97
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 3 years 6 months 24 days
Weighted Average Exercise Price, minimum (dollars per share) | $ 5.86
Weighted Average Exercise Price, maximum (dollars per share) | $ 6.00
$9.00 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options Outstanding, Number (shares) | shares | 52,775
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 9.00
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 4 years 6 months 30 days
Options Exercisable, Number (shares) | shares | 52,775
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 9.00
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 4 years 6 months 30 days
Weighted Average Exercise Price, minimum (dollars per share) | $ 9.00
$10.26 - $10.71 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options Outstanding, Number (shares) | shares | 115,129
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 10.58
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 6 years 21 days
Options Exercisable, Number (shares) | shares | 68,029
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 10.55
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 5 years 11 months
Weighted Average Exercise Price, minimum (dollars per share) | $ 10.26
Weighted Average Exercise Price, maximum (dollars per share) | $ 10.71
$15.67 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options Outstanding, Number (shares) | shares | 49,200
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 15.67
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 7 years 6 months
Options Exercisable, Number (shares) | shares | 17,400
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 15.67
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 7 years 6 months
Weighted Average Exercise Price, minimum (dollars per share) | $ 15.67
$29.69 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options Outstanding, Number (shares) | shares | 56,100
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 29.69
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 8 years 6 months
Options Exercisable, Number (shares) | shares | 11,300
Options Exercisable, Weighted Average Exercise Price (dollars per share) | $ 29.69
Options Exercisable, Weighted Average Remaining Contractual Life (Years) | 8 years 6 months
Weighted Average Exercise Price, minimum (dollars per share) | $ 29.69
$31.80 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options Outstanding, Number (shares) | shares | 45,950
Options Outstanding, Weighed Average Exercise Price (dollars per share) | $ 31.80
Options Outstanding, Weighted Average Remaining Contractual Life (Years) | 9 years 6 months
Options Exercisable, Number (shares) | shares | 0
Weighted Average Exercise Price, minimum (dollars per share) | $ 31.80

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=96867065&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(iii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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