Details of Certain Balance Sheet Accounts - Other Long-Term Obligations (Detail) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Details Of Certain Balance Sheet Accounts [Abstract] | ||
| Reserve for Uncertain Tax Positions | $ 700 | $ 500 |
| Deferred compensation plan liability | 2,800 | 3,300 |
| Other | 900 | 1,500 |
| Other long-term obligations | $ 4,456 | $ 5,285 |