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Equity (Stock Repurchase Program) (Details) (USD $) | Sep. 30, 2014 | Sep. 30, 2013 | May 31, 2012
--- | --- | --- | ---
Stock Repurchase Program |  |  |
Repurchase of common stock, authorized amount |  | $ 50,000,000 | $ 20,000,000
Available repurchase of common stock, authorized amount | $ 29,000,000 | $ 16,000,000 |

X
- Details
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Balance Type: | na
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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
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Period Type: | instant

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- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
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