Short-term borrowings (Details 2) - USD ($)
$ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Assets Sold Under Agreements To Repurchase [Line Items] |
|
|
| Total borrowings |
$ 225,832
|
$ 69,136
|
| Repurchase agreement |
|
|
| Assets Sold Under Agreements To Repurchase [Line Items] |
|
|
| Total borrowings |
75,482
|
|
| Repurchase agreement | Collateralized mortgage obligations |
|
|
| Assets Sold Under Agreements To Repurchase [Line Items] |
|
|
| Total borrowings |
7,175
|
|
| Repurchase agreement | U.S. Treasury and U.S. government sponsored entities |
|
|
| Assets Sold Under Agreements To Repurchase [Line Items] |
|
|
| Total borrowings |
5,276
|
|
| Repurchase agreement | State and political subdivisions |
|
|
| Assets Sold Under Agreements To Repurchase [Line Items] |
|
|
| Total borrowings |
2,640
|
|
| Repurchase agreement | Mortgage-backed securities - residential |
|
|
| Assets Sold Under Agreements To Repurchase [Line Items] |
|
|
| Total borrowings |
$ 60,391
|
|