Deposits (Details) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Deposit [Line Items] |
|
|
| Deposits |
$ 1,538,855
|
$ 1,577,231
|
| Deposits, average balance |
$ 1,591,971
|
$ 1,496,982
|
| Deposits, average rate |
0.74%
|
0.73%
|
| Non-interest-bearing transaction accounts |
|
|
| Deposit [Line Items] |
|
|
| Deposits |
$ 252,638
|
$ 231,199
|
| Deposits, average balance |
$ 246,182
|
$ 211,945
|
| Deposits, average rate |
0.00%
|
0.00%
|
| Interest-bearing transaction accounts |
|
|
| Deposit [Line Items] |
|
|
| Deposits |
$ 183,992
|
$ 165,921
|
| Deposits, average balance |
$ 169,571
|
$ 125,558
|
| Deposits, average rate |
0.27%
|
0.24%
|
| Money market accounts |
|
|
| Deposit [Line Items] |
|
|
| Deposits |
$ 627,090
|
$ 612,642
|
| Deposits, average balance |
$ 642,784
|
$ 602,842
|
| Deposits, average rate |
0.48%
|
0.55%
|
| Certificates of deposit |
|
|
| Deposit [Line Items] |
|
|
| Deposits |
$ 58,454
|
$ 79,986
|
| Deposits, average balance |
$ 65,608
|
$ 106,177
|
| Deposits, average rate |
0.90%
|
0.78%
|
| Wholesale deposits |
|
|
| Deposit [Line Items] |
|
|
| Deposits |
$ 416,681
|
$ 487,483
|
| Deposits, average balance |
$ 467,826
|
$ 450,460
|
| Deposits, average rate |
1.62%
|
1.43%
|