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Stock Compensation Plans: Stock Options by Exercise Price (Details) - Stock Options shares in Thousands	9 Months Ended
	Jun. 30, 2018 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number (shares) | shares	340,120
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 13.73
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	6 years 9 months 6 days
Options Exercisable, Number (shares) | shares	156,970
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 9.16
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	5 years 8 months 6 days
$4.01 - $4.55
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number (shares) | shares	6,000
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 4.28
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	2 years 5 months 6 days
Options Exercisable, Number (shares) | shares	6,000
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 4.28
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	2 years 5 months 6 days
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	30,300
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 5.96
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	4 years 3 months 6 days
Options Exercisable, Number (shares) | shares	30,300
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 5.96
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	4 years 3 months 6 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	72,800
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 9.00
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	5 years 3 months 6 days
Options Exercisable, Number (shares) | shares	54,600
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 9.00
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	5 years 3 months 6 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	121,320
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 10.58
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	6 years 9 months 6 days
Options Exercisable, Number (shares) | shares	57,470
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 10.54
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	6 years 8 months 6 days
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	52,200
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 15.67
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	8 years 3 months 6 days
Options Exercisable, Number (shares) | shares	8,600
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 15.67
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	8 years 3 months 6 days
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	57,500
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 29.69
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	9 years 3 months 6 days
Options Exercisable, Number (shares) | shares	0
Weighted Average Exercise Price, minimum (dollars per share)	$ 29.69

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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

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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

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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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)(1)(i)-(ii)
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+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 2
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