| Collectively evaluated | Individually evaluated | Total portfolio | ||||||||||||||||||||||
| December 31, 2013 (in thousands) | Loans | Allowance | Loans | Allowance | Loans | Allowance | ||||||||||||||||||
| Performing loans | $ | 416,734 | $ | 2,835 | $ | 157 | $ | 69 | $ | 416,891 | $ | 2,904 | ||||||||||||
| Potential problem loans | 8,687 | 282 | 429 | 19 | 9,116 | 301 | ||||||||||||||||||
| Impaired loans | — | — | 15,672 | 1,053 | 15,672 | 1,053 | ||||||||||||||||||
| Unallocated allowance | — | — | — | — | — | 425 | ||||||||||||||||||
| Totals | $ | 425,421 | $ | 3,117 | $ | 16,258 | $ | 1,141 | $ | 441,679 | $ | 4,683 | ||||||||||||