Derivatives (Details) - Summary of interest rate swap designated as a cash flow hedges - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Summary of interest rate swap designated as a cash flow hedges [Abstract] | ||
| Notional amount | $ 75,000 | $ 75,000 |
| Weighted average pay rates | 1.59% | 1.56% |
| Weighted average receive rates | 0.69% | 0.44% |
| Weighted average maturity | 2 years 9 months 18 days | 3 years 9 months 18 days |
| Fair value | $ 88 | $ (131) |