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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Sep. 30, 2014
Accounting Policies [Abstract] |
Supplemental Disclosures of Cash Flow Information | Supplemental Disclosures of Cash Flow Information (in thousands):
| Year Ended September 30,
| 2014 |  |  | 2013 |  |  | 2012 |
Cash paid during the period for: |  |  |  |  |  |  |  |  |  |  |
Interest, net of interest income | $ | 149 |  |  | $ | 164 |  |  | $ | 141 |
Income taxes, net of refunds |  | 18,889 |  |  |  | 14,783 |  |  |  | 12,104 |
Non-cash capital expenditures |  | 13,527 |  |  |  | 2,807 |  |  |  | — |

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- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
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