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Stockholders' Equity (Detail 2) (USD $) | 12 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2009 | Feb. 05, 2014 | Dec. 12, 2013 | Sep. 30, 2013 | May 17, 2012 | May 31, 2011 | Nov. 30, 2010 | Feb. 02, 2010 | Dec. 02, 2008
Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchase program approved amount | $ 101,900,000 |  |  |  |  |  |  |  |  |  |  |  | $ 10,000,000
Total Number of Shares Purchased | 2,962,978 |  | 229,575 | 1,225,019 | 707,462 |  |  |  |  |  |  |  |
Total Number of Shares Purchased |  | 505,067 |  |  |  |  |  |  |  |  |  |  |
Average Price Paid per Share (in dollars per share) | $ 15.90 | $ 59.41 | $ 15.39 | $ 11.53 | $ 5.50 |  |  |  |  |  |  |  |
Total Cash Paid for Shares Purchased | 44,873,000 | 29,999,000 | 3,541,000 | 14,471,000 | 3,874,000 |  |  |  |  |  |  |  |
Total Cash Paid for Shares Purchased |  | 30,000,000 |  |  |  |  |  |  |  |  |  |  |
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs | 5,127,000 | 18,114,000 | 18,114,000 | 1,655,000 | 6,126,000 |  |  | 31,000,000 |  |  |  |  |
Additional amount authorized under share repurchase program |  |  |  |  |  | $ 19,000,000 | $ 12,900,000 |  | $ 30,000,000 | $ 10,000,000 | $ 10,000,000 | $ 10,000,000 |

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- Definition Number of shares that have been repurchased and retired during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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- Definition Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 + Details
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