Related Party Transactions - Summary of Activity in Lending Transactions (Detail) - Directors and Officers [Member] - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Related Party Transaction [Line Items] | ||
| Beginning balance | $ 3,132 | $ 2,636 |
| Advances/new loans | 3,098 | 2,106 |
| Removed/payments | (2,029) | (1,610) |
| Ending balance | $ 4,201 | $ 3,132 |