Foreclosed Assets - Additional Information (Detail) - USD ($) |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|---|---|---|---|
| Schedule Of Foreclosed Assets Activity [Line Items] | |||
| Foreclosed assets | $ 5,369,000 | $ 4,894,000 | $ 6,262,000 |
| Residential Real Estate [Member] | |||
| Schedule Of Foreclosed Assets Activity [Line Items] | |||
| Foreclosed assets | 1,787,000 | ||
| Formal foreclosure proceedings | $ 658,000 |