Income Taxes - Additional Information (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2017 |
|
| Income Taxes [Abstract] | |||||
| Valuation Allowance, Deferred Tax Asset, Release due to Acquisition, amount | $ 1,800 | ||||
| Provision for income taxes (income tax benefit) | $ 1,084 | $ 549 | $ 2,155 | $ (631) | |
| New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income | 900 | 6,000 | |||
| Unrecognized Tax Benefits, Period Increase (Decrease) | 6,200 | $ 200 | |||
| Unrecognized Tax Benefits, Interest on Income Taxes Accrued | 200 | 200 | |||
| Unrecognized Tax Benefits, Income Tax Penalties Accrued | $ 20 | $ 20 | |||