Goodwill and Other Intangibles - Schedule of Goodwill (Detail) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Goodwill and Intangible Assets Disclosure [Abstract] | ||
| Balance at beginning of year | $ 17,281 | $ 15,031 |
| Additions for acquisitions | 742 | 2,555 |
| Effects of currency exchange | (234) | (305) |
| Balance at end of year | $ 17,789 | $ 17,281 |