Accrued Severance Benefits - Future Benefits Payments to Employees (Detail) $ in Thousands |
Sep. 30, 2016
USD ($)
|
|---|---|
| Compensation and Retirement Disclosure [Abstract] | |
| Remainder of 2016 | $ 0 |
| 2017 | 0 |
| 2018 | 0 |
| 2019 | 895 |
| 2020 | 1,651 |
| 2021 | 2,822 |
| 2022 - 2026 | $ 21,155 |