Loans and allowance for loan losses - Allowance for loan losses (Details) - USD ($)
$ in Thousands |
3 Months Ended |
12 Months Ended |
Mar. 31, 2021 |
Mar. 31, 2020 |
Dec. 31, 2020 |
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning Balance |
$ 3,970
|
$ 3,186
|
$ 3,186
|
| Provision for (Recovery of) Loan Losses |
|
400
|
950
|
| Charge-offs |
(8)
|
(156)
|
(292)
|
| Recoveries |
30
|
14
|
126
|
| Ending Balance |
3,992
|
3,444
|
3,970
|
| Consumer And Other [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning Balance |
190
|
|
|
| Ending Balance |
786
|
|
190
|
| Construction and land development |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning Balance |
499
|
185
|
185
|
| Provision for (Recovery of) Loan Losses |
(231)
|
303
|
289
|
| Recoveries |
|
1
|
25
|
| Ending Balance |
268
|
489
|
499
|
| Construction and land development | Residential [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning Balance |
214
|
48
|
48
|
| Provision for (Recovery of) Loan Losses |
(114)
|
170
|
141
|
| Recoveries |
|
1
|
25
|
| Ending Balance |
100
|
219
|
214
|
| Construction and land development | Commercial [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning Balance |
285
|
137
|
137
|
| Provision for (Recovery of) Loan Losses |
(117)
|
133
|
148
|
| Ending Balance |
168
|
270
|
285
|
| Commercial real estate |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning Balance |
2,517
|
1,589
|
1,589
|
| Provision for (Recovery of) Loan Losses |
(293)
|
397
|
928
|
| Ending Balance |
2,224
|
1,986
|
2,517
|
| Commercial real estate | Owner Occupied [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning Balance |
1,047
|
671
|
671
|
| Provision for (Recovery of) Loan Losses |
(148)
|
188
|
376
|
| Ending Balance |
899
|
859
|
1,047
|
| Commercial real estate | Non-Owner Occupied [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning Balance |
1,421
|
831
|
831
|
| Provision for (Recovery of) Loan Losses |
(135)
|
227
|
590
|
| Ending Balance |
1,286
|
1,058
|
1,421
|
| Commercial real estate | Multifamily [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning Balance |
47
|
85
|
85
|
| Provision for (Recovery of) Loan Losses |
(9)
|
(17)
|
(38)
|
| Ending Balance |
38
|
68
|
47
|
| Commercial real estate | Farmland [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning Balance |
2
|
2
|
2
|
| Provision for (Recovery of) Loan Losses |
(1)
|
(1)
|
|
| Ending Balance |
1
|
1
|
2
|
| Consumer real estate |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning Balance |
269
|
678
|
678
|
| Provision for (Recovery of) Loan Losses |
(56)
|
(412)
|
(392)
|
| Charge-offs |
|
|
(85)
|
| Recoveries |
15
|
7
|
68
|
| Ending Balance |
228
|
273
|
269
|
| Consumer real estate | Home equity lines [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning Balance |
24
|
271
|
271
|
| Provision for (Recovery of) Loan Losses |
(9)
|
(231)
|
(247)
|
| Ending Balance |
15
|
40
|
24
|
| Consumer real estate | First Deed of Trust [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning Balance |
166
|
343
|
343
|
| Provision for (Recovery of) Loan Losses |
(21)
|
(189)
|
(190)
|
| Recoveries |
1
|
3
|
13
|
| Ending Balance |
146
|
157
|
166
|
| Consumer real estate | Second Deed of Trust [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning Balance |
79
|
64
|
64
|
| Provision for (Recovery of) Loan Losses |
(26)
|
8
|
45
|
| Charge-offs |
|
|
(85)
|
| Recoveries |
14
|
4
|
55
|
| Ending Balance |
67
|
76
|
79
|
| Commercial and industrial loans | Commercial and industrial loans (except those secured by real estate) |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning Balance |
408
|
572
|
572
|
| Provision for (Recovery of) Loan Losses |
(13)
|
(31)
|
(58)
|
| Charge-offs |
|
(135)
|
(135)
|
| Recoveries |
15
|
3
|
29
|
| Ending Balance |
410
|
409
|
408
|
| Commercial and industrial loans | Guaranteed Student loans [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning Balance |
87
|
108
|
108
|
| Provision for (Recovery of) Loan Losses |
(3)
|
16
|
27
|
| Charge-offs |
(8)
|
(20)
|
(48)
|
| Ending Balance |
76
|
104
|
87
|
| Commercial and industrial loans | Consumer And Other [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning Balance |
36
|
30
|
30
|
| Provision for (Recovery of) Loan Losses |
2
|
9
|
26
|
| Charge-offs |
|
(1)
|
(24)
|
| Recoveries |
|
3
|
4
|
| Ending Balance |
38
|
41
|
36
|
| Commercial and industrial loans | Unallocated [Member] |
|
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] |
|
|
|
| Beginning Balance |
154
|
24
|
24
|
| Provision for (Recovery of) Loan Losses |
594
|
118
|
130
|
| Ending Balance |
$ 748
|
$ 142
|
$ 154
|