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Stock Compensation Plans: Stock Option Activity (Details) - $ / shares	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	128,000	135,000	29,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 10.62	$ 9.29	$ 6.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	(6,300)	(5,000)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 4.84	$ 4.66
Shares:
Options outstanding, beginning of period	221,400	162,946	195,626
Forfeited	(1,800)	(71,546)	(61,680)
Options outstanding, end of period	341,300	221,400	162,946
Weighted Average Exercise Price (in dollars per share):
Options outstanding, beginning of period	$ 7.49	$ 6.96	$ 7.97
Forfeited	4.55	9.87	9.69
Options outstanding, end of period	$ 8.73	$ 7.49	$ 6.96

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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