Income Taxes - Income Before Income Taxes (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Income Tax Disclosure [Abstract] | |||
| Domestic | $ 22,303 | $ 11,347 | $ 12,939 |
| Foreign | 8,406 | 7,973 | 5,450 |
| Income before income taxes | $ 30,709 | $ 19,320 | $ 18,389 |