Commitments and Contingencies - Future Minimum Payments Under Non-Cancelable Operating Leases (Detail) $ in Thousands |
Sep. 30, 2016
USD ($)
|
|---|---|
| Commitments and Contingencies Disclosure [Abstract] | |
| 2017 | $ 4,655 |
| 2018 | 4,010 |
| 2019 | 3,465 |
| 2020 | 2,684 |
| 2021 | 2,659 |
| Thereafter | 6,490 |
| Total | $ 23,963 |