Loans and allowance for loan losses - Average recorded investment in impaired loans (Details) - USD ($)
$ in Thousands |
3 Months Ended |
9 Months Ended |
Sep. 30, 2020 |
Sep. 30, 2020 |
| With no related allowance recorded |
|
|
| Average Recorded Investment |
$ 8,999
|
$ 8,666
|
| Interest Income Recognized |
|
170
|
| With an allowance recorded |
|
|
| Average Recorded Investment |
1,194
|
1,270
|
| Interest Income Recognized |
14
|
22
|
| Total |
|
|
| Average Recorded Investment |
10,193
|
9,936
|
| Interest Income Recognized |
14
|
192
|
| Construction and land development |
|
|
| With no related allowance recorded |
|
|
| Average Recorded Investment |
294
|
305
|
| Total |
|
|
| Average Recorded Investment |
294
|
305
|
| Construction and land development | Commercial [Member] |
|
|
| With no related allowance recorded |
|
|
| Average Recorded Investment |
294
|
305
|
| Total |
|
|
| Average Recorded Investment |
294
|
305
|
| Commercial real estate |
|
|
| With no related allowance recorded |
|
|
| Average Recorded Investment |
5,301
|
5,074
|
| Interest Income Recognized |
|
105
|
| With an allowance recorded |
|
|
| Average Recorded Investment |
843
|
985
|
| Interest Income Recognized |
14
|
14
|
| Total |
|
|
| Average Recorded Investment |
6,144
|
6,059
|
| Interest Income Recognized |
14
|
119
|
| Commercial real estate | Owner Occupied [Member] |
|
|
| With no related allowance recorded |
|
|
| Average Recorded Investment |
3,325
|
3,016
|
| Interest Income Recognized |
|
68
|
| With an allowance recorded |
|
|
| Average Recorded Investment |
843
|
985
|
| Interest Income Recognized |
14
|
14
|
| Total |
|
|
| Average Recorded Investment |
4,168
|
4,001
|
| Interest Income Recognized |
14
|
82
|
| Commercial real estate | Non-Owner Occupied [Member] |
|
|
| With no related allowance recorded |
|
|
| Average Recorded Investment |
1,976
|
2,058
|
| Interest Income Recognized |
|
37
|
| Total |
|
|
| Average Recorded Investment |
1,976
|
2,058
|
| Interest Income Recognized |
|
37
|
| Consumer real estate |
|
|
| With no related allowance recorded |
|
|
| Average Recorded Investment |
3,249
|
3,119
|
| Interest Income Recognized |
|
65
|
| With an allowance recorded |
|
|
| Average Recorded Investment |
179
|
122
|
| Interest Income Recognized |
|
2
|
| Total |
|
|
| Average Recorded Investment |
3,428
|
3,241
|
| Interest Income Recognized |
|
67
|
| Consumer real estate | Home equity lines [Member] |
|
|
| With no related allowance recorded |
|
|
| Average Recorded Investment |
300
|
300
|
| Interest Income Recognized |
|
8
|
| With an allowance recorded |
|
|
| Average Recorded Investment |
|
300
|
| Interest Income Recognized |
|
8
|
| Total |
|
|
| Average Recorded Investment |
300
|
|
| Consumer real estate | First Deed of Trust [Member] |
|
|
| With no related allowance recorded |
|
|
| Average Recorded Investment |
2,113
|
2,023
|
| Interest Income Recognized |
|
33
|
| With an allowance recorded |
|
|
| Average Recorded Investment |
76
|
77
|
| Interest Income Recognized |
|
2
|
| Total |
|
|
| Average Recorded Investment |
2,189
|
2,100
|
| Interest Income Recognized |
|
35
|
| Consumer real estate | Second Deed of Trust [Member] |
|
|
| With no related allowance recorded |
|
|
| Average Recorded Investment |
836
|
796
|
| Interest Income Recognized |
|
24
|
| With an allowance recorded |
|
|
| Average Recorded Investment |
103
|
45
|
| Total |
|
|
| Average Recorded Investment |
939
|
841
|
| Interest Income Recognized |
|
24
|
| Commercial and industrial loans | Commercial and industrial loans (except those secured by real estate) |
|
|
| With no related allowance recorded |
|
|
| Average Recorded Investment |
155
|
168
|
| With an allowance recorded |
|
|
| Average Recorded Investment |
56
|
163
|
| Interest Income Recognized |
|
6
|
| Total |
|
|
| Average Recorded Investment |
211
|
331
|
| Interest Income Recognized |
|
$ 6
|
| Commercial and industrial loans | Consumer And Other [Member] |
|
|
| With an allowance recorded |
|
|
| Average Recorded Investment |
116
|
|
| Total |
|
|
| Average Recorded Investment |
$ 116
|
|