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Stockholders' Equity (Details 2) (USD $)
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0 Months Ended | 12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
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May 17, 2012
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May 03, 2011
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Nov. 30, 2010
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Feb. 02, 2010
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Dec. 02, 2008
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2011
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Sep. 30, 2010
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Sep. 30, 2009
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| Stockholders' Equity | ||||||||||
| Share repurchase program approved amount | $ 10,000,000 | |||||||||
| Additional amount authorized under share repurchase program | 30,000,000 | 10,000,000 | 10,000,000 | 10,000,000 | ||||||
| Shares purchased | 0 | 229,575 | 1,225,019 | 707,462 | ||||||
| Shares purchased amount | 29,999,000 | 3,541,000 | 14,471,000 | 3,874,000 | ||||||
| Shares purchased and retired | 505,067 | |||||||||
| Shares purchased and retired amount | 30,000,000 | |||||||||
| Amount yet to be expended under the program | $ 18,114,000 | |||||||||