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Fair Value Measurements (Details) (Fair Value, Inputs, Level 1 [Member], USD $) In Thousands, unless otherwise specified | Sep. 30, 2012 | Sep. 30, 2011
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Fair Value, Inputs, Level 1 [Member] |  |
Liabilities: |  |
11% Notes due 2016, Carrying Amount | $ 344,451 | $ 344,441
11% Notes due 2016, Fair Value | $ 376,050 | $ 372,600

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