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Common Stock Repurchase (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2017	May 02, 2017	Apr. 26, 2016
April 2016 Repurchase program
Stock repurchase program, authorized amount			$ 15.0
Shares repurchased	0
May 2017 Repurchase program
Stock repurchase program, authorized amount		$ 20.0
Shares repurchased	28,691
Shares repurchased, cost	$ 0.3
Stock repurchase program, remaining authorized repurchase amount	$ 19.7

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- Definition

Amount of stock repurchase plan authorized.

+ References

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Amount remaining of a stock repurchase plan authorized.

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- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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