Stock-Based Compensation - Unrecognized Compensation Cost Related to Non-Vested Stock-Based Awards Granted (Detail) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
---|---|---|---|
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | |||
Total unrecognized compensation costs | $ 9,549 | $ 11,206 | $ 9,711 |