Loans and allowance for loan losses - Impaired loans (Details) - USD ($)
$ in Thousands |
Sep. 30, 2020 |
Dec. 31, 2019 |
| With no related allowance recorded |
|
|
| Recorded Investment |
$ 8,359
|
$ 7,745
|
| Unpaid Principal Balance |
8,604
|
8,152
|
| With an allowance recorded |
|
|
| Recorded Investment |
1,472
|
1,627
|
| Unpaid Principal Balance |
1,634
|
1,826
|
| Related Allowance |
104
|
159
|
| Total |
|
|
| Recorded Investment |
9,831
|
9,372
|
| Unpaid Principal Balance |
10,238
|
9,978
|
| Related Allowance |
104
|
159
|
| Construction and land development |
|
|
| With no related allowance recorded |
|
|
| Recorded Investment |
289
|
337
|
| Unpaid Principal Balance |
289
|
337
|
| Total |
|
|
| Recorded Investment |
289
|
337
|
| Unpaid Principal Balance |
289
|
337
|
| Construction and land development | Commercial [Member] |
|
|
| With no related allowance recorded |
|
|
| Recorded Investment |
289
|
337
|
| Unpaid Principal Balance |
289
|
337
|
| Total |
|
|
| Recorded Investment |
289
|
337
|
| Unpaid Principal Balance |
289
|
337
|
| Commercial real estate |
|
|
| With no related allowance recorded |
|
|
| Recorded Investment |
4,812
|
4,393
|
| Unpaid Principal Balance |
4,827
|
4,408
|
| With an allowance recorded |
|
|
| Recorded Investment |
1,125
|
1,414
|
| Unpaid Principal Balance |
1,125
|
1,414
|
| Related Allowance |
3
|
15
|
| Total |
|
|
| Recorded Investment |
5,937
|
5,807
|
| Unpaid Principal Balance |
5,952
|
5,822
|
| Related Allowance |
3
|
15
|
| Commercial real estate | Owner Occupied [Member] |
|
|
| With no related allowance recorded |
|
|
| Recorded Investment |
3,121
|
2,089
|
| Unpaid Principal Balance |
3,136
|
2,104
|
| With an allowance recorded |
|
|
| Recorded Investment |
1,125
|
1,414
|
| Unpaid Principal Balance |
1,125
|
1,414
|
| Related Allowance |
3
|
15
|
| Total |
|
|
| Recorded Investment |
4,246
|
3,503
|
| Unpaid Principal Balance |
4,261
|
3,518
|
| Related Allowance |
3
|
15
|
| Commercial real estate | Non-Owner Occupied [Member] |
|
|
| With no related allowance recorded |
|
|
| Recorded Investment |
1,691
|
2,304
|
| Unpaid Principal Balance |
1,691
|
2,304
|
| Total |
|
|
| Recorded Investment |
1,691
|
2,304
|
| Unpaid Principal Balance |
1,691
|
2,304
|
| Consumer real estate |
|
|
| With no related allowance recorded |
|
|
| Recorded Investment |
3,110
|
2,804
|
| Unpaid Principal Balance |
3,340
|
3,034
|
| With an allowance recorded |
|
|
| Recorded Investment |
178
|
78
|
| Unpaid Principal Balance |
178
|
78
|
| Related Allowance |
85
|
9
|
| Total |
|
|
| Recorded Investment |
3,288
|
2,882
|
| Unpaid Principal Balance |
3,518
|
3,112
|
| Related Allowance |
85
|
9
|
| Consumer real estate | Home equity lines [Member] |
|
|
| With no related allowance recorded |
|
|
| Recorded Investment |
300
|
300
|
| Unpaid Principal Balance |
300
|
300
|
| Total |
|
|
| Recorded Investment |
300
|
300
|
| Unpaid Principal Balance |
300
|
300
|
| Consumer real estate | First Deed of Trust [Member] |
|
|
| With no related allowance recorded |
|
|
| Recorded Investment |
2,096
|
1,752
|
| Unpaid Principal Balance |
2,118
|
1,774
|
| With an allowance recorded |
|
|
| Recorded Investment |
75
|
78
|
| Unpaid Principal Balance |
75
|
78
|
| Related Allowance |
8
|
9
|
| Total |
|
|
| Recorded Investment |
2,171
|
1,830
|
| Unpaid Principal Balance |
2,193
|
1,852
|
| Related Allowance |
8
|
9
|
| Consumer real estate | Second Deed of Trust [Member] |
|
|
| With no related allowance recorded |
|
|
| Recorded Investment |
714
|
752
|
| Unpaid Principal Balance |
922
|
960
|
| With an allowance recorded |
|
|
| Recorded Investment |
103
|
|
| Unpaid Principal Balance |
103
|
|
| Related Allowance |
77
|
|
| Total |
|
|
| Recorded Investment |
817
|
752
|
| Unpaid Principal Balance |
1,025
|
960
|
| Related Allowance |
77
|
|
| Commercial and industrial loans | Commercial and industrial loans (except those secured by real estate) |
|
|
| With no related allowance recorded |
|
|
| Recorded Investment |
148
|
211
|
| Unpaid Principal Balance |
148
|
373
|
| With an allowance recorded |
|
|
| Recorded Investment |
169
|
135
|
| Unpaid Principal Balance |
331
|
334
|
| Related Allowance |
16
|
135
|
| Total |
|
|
| Recorded Investment |
317
|
346
|
| Unpaid Principal Balance |
479
|
707
|
| Related Allowance |
$ 16
|
$ 135
|