Other Accrued Expenses (Detail) - USD ($) $ in Thousands |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Payables And Accruals [Abstract] | ||
| Accrued personnel costs | $ 10,345 | $ 8,250 |
| Accrued interest payable | 299 | 2,096 |
| Accrued expenses - other | 1,262 | 959 |
| Other accrued expenses | $ 11,906 | $ 11,305 |