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Dividends (Details) - $ / shares |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Jul. 27, 2015 | Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014 | May. 31, 2015
Dividends Payable [Line Items] |  |  |  |  |  |
Cash dividends per share (in dollars per share) |  | $ 0.13 | $ 0.1 | $ 0.41 | $ 0.30 |
Number of shares authorized |  |  |  |  |  | 5,000,000
Shares repurchased |  |  |  | 4,800,000 |  |
Percent of outstanding shares acquired |  |  |  | 4.90% |  |
Average cost per share (in dollars per share) |  |  |  | $ 21.52 |  |
Subsequent Event [Member] |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |
Dividends declared (in dollars per share) | $ 0.13 |  |  |  |  |

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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