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Fair Value of Financial Instruments (Details Textual) (Level 3 [Member], USD $) In Thousands, unless otherwise specified | Sep. 30, 2012 | Sep. 30, 2011
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Level 3 [Member] |  |
Fair Value of Financial Instruments (Textual) [Abstract] |  |
Percentage of investment portfolio fair value | 89.00% |
Unrealized gain or losses | $ 4,590 | $ 0
Percentage of invested assets in whole investment portfolio | 3.00% |

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- Definition Percentage of invested assets in whole investment portfolio. + References No definition available. + Details
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- Definition Percentage of investment portfolio fair value level 3. + References No definition available. + Details
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- Definition Realized gain loss on assets included in earning due to change in unrealized gain or losses attributable to Level 3 assets still held. + References No definition available. + Details
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