Retirement Plans - Additional Information (Detail) - Safe Harbor Plan [Member] - USD ($) $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
Jan. 01, 2010 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Defined contribution plan, employer matching contribution, percent of match | 4.00% | |||
| Defined contribution plan, employer matching contribution | $ 264 | $ 163 | $ 145 | |