Securities Sold under Agreements to Repurchase (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Securities Sold under Agreements to Repurchase [Abstract] | ||
| Pledge securities | 8.00% | |
| Securities carrying amount | $ 16,800 | $ 18,900 |