Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Goodwill and Intangible Assets Disclosure [Abstract] | |||
| Amortization expense on other intangible assets | $ 970 | $ 972 | $ 1,140 |