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Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014 | Sep. 30, 2014
Income Tax Disclosure [Abstract] |  |  |  |  |
Income tax provision (benefit) | $ 795 | $ (213) | $ 814 | $ (1,454) |
Income tax expense (benefit) specific to the period |  |  | (900) | $ (1,400) |
Unrecognized tax benefits that would impact effective tax rate | 1,500 |  | 1,500 |  |
Expected change in unrecognized tax benefits, minimum | 200 |  | 200 |  |
Income tax penalties and interest accrued | 300 |  | 300 |  | $ 400
Accumulated undistributed foreign earnings | 28,800 |  | 28,800 |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Unrecognized tax benefits | 1,539 |  | 1,539 |  | $ 2,301
Minimum |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Estimate of unrecognized deferred tax liability | 900 |  | 900 |  |
Maximum |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Estimate of unrecognized deferred tax liability | 1,900 |  | 1,900 |  |
Non-current income taxes payable |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Unrecognized tax benefits | 1,100 |  | 1,100 |  |
Non-current deferred tax assets |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Unrecognized tax benefits | $ 400 |  | $ 400 |  |

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