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Fair Value Measurements (Fair Value of Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($) $ in Thousands | Sep. 30, 2015 | Sep. 30, 2014
--- | --- | ---
Assets: |  |
Cash equivalents | $ 434 | $ 10,535
Deferred compensation | 4,783 | 3,526
Liabilities: |  |
Deferred compensation | 4,487 | 3,688
Fair Value, Inputs, Level 1 |  |
Assets: |  |
Cash equivalents | 434 | 10,535
Deferred compensation | 1,879 | 724
Fair Value, Inputs, Level 2 |  |
Assets: |  |
Deferred compensation | 2,904 | 2,802
Liabilities: |  |
Deferred compensation | $ 4,487 | $ 3,688

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