Loans and allowance for credit losses - Individually Assessed Allowance for Credit Losses for Collateral Dependent Loans (Details) - USD ($)
$ in Thousands |
Dec. 31, 2020 |
Jan. 01, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
$ 170,389
|
$ 31,139
|
$ 31,139
|
$ 28,932
|
$ 24,041
|
| Individually assessed allowance for credit loss |
2,039
|
|
895
|
268
|
|
| Commercial and industrial |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
14,748
|
|
4,805
|
5,348
|
4,461
|
| Individually assessed allowance for credit loss |
373
|
|
241
|
3
|
|
| Construction |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
58,477
|
|
10,194
|
9,729
|
7,135
|
| Individually assessed allowance for credit loss |
95
|
|
0
|
0
|
|
| Residential real estate | 1-to-4 family mortgage |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
19,220
|
|
3,112
|
3,428
|
3,197
|
| Individually assessed allowance for credit loss |
0
|
|
8
|
7
|
|
| Residential real estate | Residential line of credit |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
10,534
|
|
752
|
811
|
944
|
| Individually assessed allowance for credit loss |
9
|
|
9
|
0
|
|
| Residential real estate | Multi-family mortgage |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
7,174
|
|
544
|
566
|
434
|
| Individually assessed allowance for credit loss |
0
|
|
0
|
0
|
|
| Commercial real estate | Owner occupied |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
4,849
|
|
4,109
|
3,132
|
3,558
|
| Individually assessed allowance for credit loss |
30
|
|
238
|
53
|
|
| Commercial real estate | Non-owner occupied |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
44,147
|
|
4,621
|
4,149
|
2,817
|
| Individually assessed allowance for credit loss |
1,531
|
|
399
|
205
|
|
| Consumer and other |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
11,240
|
|
3,002
|
1,769
|
$ 1,495
|
| Individually assessed allowance for credit loss |
1
|
|
$ 0
|
$ 0
|
|
| Real Estate |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
16,832
|
|
|
|
|
| Real Estate | Commercial and industrial |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
0
|
|
|
|
|
| Real Estate | Construction |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
3,877
|
|
|
|
|
| Real Estate | Residential real estate | 1-to-4 family mortgage |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
226
|
|
|
|
|
| Real Estate | Residential real estate | Residential line of credit |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
1,174
|
|
|
|
|
| Real Estate | Residential real estate | Multi-family mortgage |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
0
|
|
|
|
|
| Real Estate | Commercial real estate | Owner occupied |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
3,391
|
|
|
|
|
| Real Estate | Commercial real estate | Non-owner occupied |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
8,164
|
|
|
|
|
| Real Estate | Consumer and other |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
0
|
|
|
|
|
| Financial Assets and Equipment |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
1,728
|
|
|
|
|
| Financial Assets and Equipment | Commercial and industrial |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
1,728
|
|
|
|
|
| Financial Assets and Equipment | Construction |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
0
|
|
|
|
|
| Financial Assets and Equipment | Residential real estate | 1-to-4 family mortgage |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
0
|
|
|
|
|
| Financial Assets and Equipment | Residential real estate | Residential line of credit |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
0
|
|
|
|
|
| Financial Assets and Equipment | Residential real estate | Multi-family mortgage |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
0
|
|
|
|
|
| Financial Assets and Equipment | Commercial real estate | Owner occupied |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
0
|
|
|
|
|
| Financial Assets and Equipment | Commercial real estate | Non-owner occupied |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
0
|
|
|
|
|
| Financial Assets and Equipment | Consumer and other |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Type of Collateral |
0
|
|
|
|
|
| Collateral Pledged |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Individually assessed allowance for credit loss |
1,687
|
|
|
|
|
| Collateral Pledged | Commercial and industrial |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Individually assessed allowance for credit loss |
117
|
|
|
|
|
| Collateral Pledged | Construction |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Individually assessed allowance for credit loss |
0
|
|
|
|
|
| Collateral Pledged | Residential real estate | 1-to-4 family mortgage |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Individually assessed allowance for credit loss |
0
|
|
|
|
|
| Collateral Pledged | Residential real estate | Residential line of credit |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Individually assessed allowance for credit loss |
9
|
|
|
|
|
| Collateral Pledged | Residential real estate | Multi-family mortgage |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Individually assessed allowance for credit loss |
0
|
|
|
|
|
| Collateral Pledged | Commercial real estate | Owner occupied |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Individually assessed allowance for credit loss |
30
|
|
|
|
|
| Collateral Pledged | Commercial real estate | Non-owner occupied |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Individually assessed allowance for credit loss |
1,531
|
|
|
|
|
| Collateral Pledged | Consumer and other |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] |
|
|
|
|
|
| Individually assessed allowance for credit loss |
$ 0
|
|
|
|
|