Goodwill and Other Intangibles - Amortization Expense Included in General and Administrative Expense (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Goodwill and Intangible Assets Disclosure [Abstract] | |||
| Amortization expense | $ 1,513 | $ 1,539 | $ 1,220 |