Short-term borrowings (Parenthetical) (Details) - Pledged |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Repurchase advance | ||
| Assets Sold Under Agreements To Repurchase [Line Items] | ||
| Federal Home Loan Bank interest rate | 0.39% | |
| Cash management advance | ||
| Assets Sold Under Agreements To Repurchase [Line Items] | ||
| Federal Home Loan Bank interest rate | 0.26% | 0.45% |