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Securities And Equity Investments (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Jun. 30, 2012 | Sep. 30, 2011
Related Party Transaction [Line Items] |  |
Fair value of our investment in EnerTech | $ 919 | 1,003
Enertech Capital Partners II L.P. |  |
Related Party Transaction [Line Items] |  |
Equity Method Investment, Ownership Percentage | 2.00% | 2.00%
Receipt of Distribution Reducing Carrying Value of Assets | $ 83 |

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