|
Other borrowings (Narrative) (Details) (USD $)
|
1 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2013
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Debt Disclosure [Abstract] | ||||
| Borrowing capacity as percent of total assets | 20.00% | |||
| FHLB borrowings outstanding Total | $ 0 | $ 27,000,000 | ||
| FHLB, prepayments | 60,000,000 | |||
| FHLB, weighted average interest rate | 3.17% | 0.25% | ||
| Prepayment penalties | 0 | 3,827,000 | 0 | |
| FHLB, maximum amount available | 466,800,000 | |||
| FRB line of credit, amount outstanding | 0 | |||
| Federal reserves bank, undrawn borrowing capcity | 14,000,000 | |||
| Federal funds maximum borrowing capacity | 90,000,000 | |||
| Federal funds outstanding borrowings | $ 0 | |||