Loans and Allowance for Loan Losses - Additional Information (Details) - USD ($) |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Related Party Transaction [Line Items] | ||
| Available lines of credit for loans and credit cards to affiliates | $ 537,000 | |
| Affiliates | ||
| Related Party Transaction [Line Items] | ||
| Outstanding loans with affiliates | $ 330,000 | $ 521,000 |