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Loans and Allowance for Loan Losses (Tables) | 9 Months Ended
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Sep. 30, 2021
Loans and Allowance for Loan Losses |
Schedule of total loans outstanding by portfolio segment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | September 30, |  | December 31,
(dollars in thousands) |  | 2021 |  | 2020
Commercial | ​ | ​ | ​ | ​ | ​ | ​
Commercial and industrial (1) | ​ | $ | 506,599 | ​ | $ | 691,858
Real estate construction | ​ |  | 37,751 | ​ |  | 44,451
Commercial real estate | ​ |  | 573,518 | ​ |  | 563,007
Total commercial | ​ |  | 1,117,868 | ​ |  | 1,299,316
Consumer | ​ |  |  | ​ |  |
Residential real estate first mortgage | ​ |  | 501,339 | ​ |  | 463,370
Residential real estate junior lien | ​ |  | 130,243 | ​ |  | 143,416
Other revolving and installment | ​ |  | 50,936 | ​ |  | 73,273
Total consumer | ​ |  | 682,518 | ​ |  | 680,059
Total loans | ​ | $ | 1,800,386 | ​ | $ | 1,979,375
(1) | Included Paycheck Protection Program, or PPP, loans of $103.5 million at September 30, 2021 and $268.4 million at December 31, 2020.
Schedule of past due aging analysis of the loan portfolio | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2021
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 90 Days | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Accruing | ​ | 30 - 89 Days | ​ | or More | ​ | ​ | ​ | ​ | Total
(dollars in thousands) |  | Current |  | Past Due |  | Past Due |  | Nonaccrual |  | Loans
Commercial |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Commercial and industrial | ​ | $ | 504,309 | ​ | $ | 657 | ​ | $ | — | ​ | $ | 1,633 | ​ | $ | 506,599
Real estate construction | ​ |  | 37,751 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 37,751
Commercial real estate | ​ |  | 569,209 | ​ |  | — | ​ |  | — | ​ |  | 4,309 | ​ |  | 573,518
Total commercial | ​ |  | 1,111,269 | ​ |  | 657 | ​ |  | — | ​ |  | 5,942 | ​ |  | 1,117,868
Consumer | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Residential real estate first mortgage | ​ |  | 500,350 | ​ |  | 876 | ​ |  | — | ​ |  | 113 | ​ |  | 501,339
Residential real estate junior lien | ​ |  | 129,521 | ​ |  | 552 | ​ |  | — | ​ |  | 170 | ​ |  | 130,243
Other revolving and installment | ​ |  | 50,735 | ​ |  | 197 | ​ |  | — | ​ |  | 4 | ​ |  | 50,936
Total consumer | ​ |  | 680,606 | ​ |  | 1,625 | ​ |  | — | ​ |  | 287 | ​ |  | 682,518
Total loans | ​ | $ | 1,791,875 | ​ | $ | 2,282 | ​ | $ | — | ​ | $ | 6,229 | ​ | $ | 1,800,386
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 90 Days | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Accruing | ​ | 30 - 89 Days | ​ | or More | ​ | ​ | ​ | ​ | Total
(dollars in thousands) |  | Current |  | Past Due |  | Past Due |  | Nonaccrual |  | Loans
Commercial | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Commercial and industrial | ​ | $ | 689,340 | ​ | $ | 500 | ​ | $ | 30 | ​ | $ | 1,988 | ​ | $ | 691,858
Real estate construction | ​ |  | 44,451 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 44,451
Commercial real estate | ​ |  | 558,127 | ​ |  | 2,449 | ​ |  | — | ​ |  | 2,431 | ​ |  | 563,007
Total commercial | ​ |  | 1,291,918 | ​ |  | 2,949 | ​ |  | 30 | ​ |  | 4,419 | ​ |  | 1,299,316
Consumer | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Residential real estate first mortgage | ​ |  | 461,179 | ​ |  | 1,752 | ​ |  | — | ​ |  | 439 | ​ |  | 463,370
Residential real estate junior lien | ​ |  | 143,060 | ​ |  | 191 | ​ |  | — | ​ |  | 165 | ​ |  | 143,416
Other revolving and installment | ​ |  | 73,128 | ​ |  | 118 | ​ |  | — | ​ |  | 27 | ​ |  | 73,273
Total consumer | ​ |  | 677,367 | ​ |  | 2,061 | ​ |  | — | ​ |  | 631 | ​ |  | 680,059
Total loans | ​ | $ | 1,969,285 | ​ | $ | 5,010 | ​ | $ | 30 | ​ | $ | 5,050 | ​ | $ | 1,979,375
​
Schedule of loans outstanding, by portfolio segment and risk category | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2021
​ | ​ | ​ | ​ | ​ | Criticized | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Special | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(dollars in thousands) |  | Pass |  | Mention |  | Substandard |  | Doubtful |  | Total
Commercial |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Commercial and industrial | ​ | $ | 498,201 | ​ | $ | 1,777 | ​ | $ | 6,374 | ​ | $ | 247 | ​ | $ | 506,599
Real estate construction | ​ |  | 37,751 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 37,751
Commercial real estate | ​ |  | 553,492 | ​ |  | 2,316 | ​ |  | 17,710 | ​ |  | — | ​ |  | 573,518
Total commercial | ​ | ​ | 1,089,444 | ​ | ​ | 4,093 | ​ | ​ | 24,084 | ​ | ​ | 247 | ​ | ​ | 1,117,868
Consumer | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Residential real estate first mortgage | ​ |  | 499,497 | ​ |  | — | ​ |  | 1,842 | ​ |  | — | ​ |  | 501,339
Residential real estate junior lien | ​ |  | 129,303 | ​ |  | — | ​ |  | 940 | ​ |  | — | ​ |  | 130,243
Other revolving and installment | ​ |  | 50,932 | ​ |  | — | ​ |  | 4 | ​ |  | — | ​ |  | 50,936
Total consumer | ​ |  | 679,732 | ​ |  | — | ​ |  | 2,786 | ​ |  | — | ​ |  | 682,518
Total loans | ​ | $ | 1,769,176 | ​ | $ | 4,093 | ​ | $ | 26,870 | ​ | $ | 247 | ​ | $ | 1,800,386
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ | ​ | ​ | ​ | ​ | Criticized | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Special | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(dollars in thousands) |  | Pass |  | Mention |  | Substandard |  | Doubtful |  | Total
Commercial |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Commercial and industrial | ​ | $ | 669,602 | ​ | $ | 5,415 | ​ | $ | 16,841 | ​ | $ | — | ​ | $ | 691,858
Real estate construction | ​ |  | 44,451 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 44,451
Commercial real estate | ​ |  | 533,733 | ​ |  | 6,686 | ​ |  | 22,588 | ​ |  | — | ​ |  | 563,007
Total commercial | ​ | ​ | 1,247,786 | ​ | ​ | 12,101 | ​ | ​ | 39,429 | ​ | ​ | — | ​ | ​ | 1,299,316
Consumer | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Residential real estate first mortgage | ​ |  | 461,221 | ​ |  | 1,406 | ​ |  | 743 | ​ |  | — | ​ |  | 463,370
Residential real estate junior lien | ​ |  | 140,461 | ​ |  | 1,819 | ​ |  | 1,136 | ​ |  | — | ​ |  | 143,416
Other revolving and installment | ​ |  | 73,236 | ​ |  | — | ​ |  | 37 | ​ |  | — | ​ |  | 73,273
Total consumer | ​ |  | 674,918 | ​ |  | 3,225 | ​ |  | 1,916 | ​ |  | — | ​ |  | 680,059
Total loans | ​ | $ | 1,922,704 | ​ | $ | 15,326 | ​ | $ | 41,345 | ​ | $ | — | ​ | $ | 1,979,375
​
Summary of changes in allowances | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended September 30, 2021
​ | ​ | Beginning | ​ | Provision for | ​ | Loan | ​ | Loan | ​ | Ending
(dollars in thousands) |  | Balance |  | Loan Losses |  | Charge-offs |  | Recoveries |  | Balance
Commercial |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Commercial and industrial | ​ | $ | 9,620 | ​ | $ | (825) | ​ | $ | (747) | ​ | $ | 1,052 | ​ | $ | 9,100
Real estate construction | ​ |  | 587 | ​ |  | 92 | ​ |  | — | ​ |  | — | ​ |  | 679
Commercial real estate | ​ |  | 12,937 | ​ |  | (413) | ​ |  | — | ​ |  | — | ​ |  | 12,524
Total commercial | ​ |  | 23,144 | ​ |  | (1,146) | ​ |  | (747) | ​ |  | 1,052 | ​ |  | 22,303
Consumer | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Residential real estate first mortgage | ​ |  | 6,176 | ​ |  | 625 | ​ |  | — | ​ |  | — | ​ |  | 6,801
Residential real estate junior lien | ​ |  | 1,401 | ​ |  | 6 | ​ |  | — | ​ |  | 16 | ​ |  | 1,423
Other revolving and installment | ​ |  | 574 | ​ |  | (32) | ​ |  | (46) | ​ |  | 27 | ​ |  | 523
Total consumer | ​ |  | 8,151 | ​ |  | 599 | ​ |  | (46) | ​ |  | 43 | ​ |  | 8,747
Unallocated | ​ |  | 2,469 | ​ |  | (1,453) | ​ |  | — | ​ |  | — | ​ |  | 1,016
Total | ​ | $ | 33,764 | ​ | $ | (2,000) | ​ | $ | (793) | ​ | $ | 1,095 | ​ | $ | 32,066
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Nine months ended September 30, 2021
​ | ​ | Beginning | ​ | Provision for | ​ | Loan | ​ | Loan | ​ | Ending
(dollars in thousands) |  | Balance |  | Loan Losses |  | Charge-offs |  | Recoveries |  | Balance
Commercial | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial and industrial | ​ | $ | 10,205 | ​ | $ | (1,378) | ​ | $ | (1,224) | ​ | $ | 1,497 | ​ | $ | 9,100
Real estate construction | ​ | ​ | 658 | ​ | ​ | 21 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 679
Commercial real estate | ​ | ​ | 14,105 | ​ | ​ | (1,049) | ​ | ​ | (536) | ​ | ​ | 4 | ​ | ​ | 12,524
Total commercial | ​ | ​ | 24,968 | ​ | ​ | (2,406) | ​ | ​ | (1,760) | ​ | ​ | 1,501 | ​ | ​ | 22,303
Consumer | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential real estate first mortgage | ​ | ​ | 5,774 | ​ | ​ | 1,027 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 6,801
Residential real estate junior lien | ​ | ​ | 1,373 | ​ | ​ | (63) | ​ | ​ | — | ​ | ​ | 113 | ​ | ​ | 1,423
Other revolving and installment | ​ | ​ | 753 | ​ | ​ | (196) | ​ | ​ | (139) | ​ | ​ | 105 | ​ | ​ | 523
Total consumer | ​ | ​ | 7,900 | ​ | ​ | 768 | ​ | ​ | (139) | ​ | ​ | 218 | ​ | ​ | 8,747
Unallocated | ​ | ​ | 1,378 | ​ | ​ | (362) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,016
Total | ​ | $ | 34,246 | ​ | $ | (2,000) | ​ | $ | (1,899) | ​ | $ | 1,719 | ​ | $ | 32,066
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended September 30, 2020
​ | ​ | Beginning | ​ | Provision for | ​ | Loan | ​ | Loan | ​ | Ending
(dollars in thousands) |  | Balance |  | Loan Losses |  | Charge-offs |  | Recoveries |  | Balance
Commercial | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial and industrial | ​ | $ | 10,797 | ​ | $ | (846) | ​ | $ | (10) | ​ | $ | 432 | ​ | $ | 10,373
Real estate construction | ​ | ​ | 443 | ​ |  | 40 | ​ |  | — | ​ |  | — | ​ | ​ | 483
Commercial real estate | ​ | ​ | 9,948 | ​ |  | 1,828 | ​ |  | — | ​ |  | 95 | ​ | ​ | 11,871
Total commercial | ​ | ​ | 21,188 | ​ |  | 1,022 | ​ |  | (10) | ​ |  | 527 | ​ | ​ | 22,727
Consumer | ​ | ​ | ​ | ​ |  |  | ​ |  |  | ​ |  |  | ​ | ​ | ​
Residential real estate first mortgage | ​ | ​ | 2,673 | ​ |  | 1,694 | ​ |  | — | ​ |  | — | ​ | ​ | 4,367
Residential real estate junior lien | ​ | ​ | 1,102 | ​ |  | 28 | ​ |  | — | ​ |  | 81 | ​ | ​ | 1,211
Other revolving and installment | ​ | ​ | 546 | ​ |  | 108 | ​ |  | (41) | ​ |  | 24 | ​ | ​ | 637
Total consumer | ​ | ​ | 4,321 | ​ | ​ | 1,830 | ​ | ​ | (41) | ​ | ​ | 105 | ​ | ​ | 6,215
Unallocated | ​ | ​ | 1,747 | ​ |  | 648 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,395
Total | ​ | $ | 27,256 | ​ | $ | 3,500 | ​ | $ | (51) | ​ | $ | 632 | ​ | $ | 31,337
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Nine months ended September 30, 2020
​ | ​ | Beginning | ​ | Provision for | ​ | Loan | ​ | Loan | ​ | Ending
(dollars in thousands) |  | Balance |  | Loan Losses |  | Charge-offs |  | Recoveries |  | Balance
Commercial | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Commercial and industrial | ​ | $ | 12,270 | ​ | $ | (498) | ​ | $ | (2,745) | ​ | $ | 1,346 | ​ | $ | 10,373
Real estate construction | ​ |  | 303 | ​ |  | 180 | ​ |  | — | ​ |  | — | ​ |  | 483
Commercial real estate | ​ |  | 6,688 | ​ |  | 5,953 | ​ |  | (865) | ​ |  | 95 | ​ |  | 11,871
Total commercial | ​ |  | 19,261 | ​ |  | 5,635 | ​ |  | (3,610) | ​ |  | 1,441 | ​ |  | 22,727
Consumer | ​ |  | ​ | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Residential real estate first mortgage | ​ |  | 1,448 | ​ |  | 2,914 | ​ |  | — | ​ |  | 5 | ​ |  | 4,367
Residential real estate junior lien | ​ |  | 671 | ​ |  | 377 | ​ |  | (12) | ​ |  | 175 | ​ |  | 1,211
Other revolving and installment | ​ |  | 352 | ​ |  | 371 | ​ |  | (194) | ​ |  | 108 | ​ |  | 637
Total consumer | ​ |  | 2,471 | ​ |  | 3,662 | ​ |  | (206) | ​ |  | 288 | ​ |  | 6,215
Unallocated | ​ |  | 2,192 | ​ |  | 203 | ​ |  | — | ​ |  | — | ​ |  | 2,395
Total | ​ | $ | 23,924 | ​ | $ | 9,500 | ​ | $ | (3,816) | ​ | $ | 1,729 | ​ | $ | 31,337
​
Schedule of loans distributed by portfolio segment and impairment methodology | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2021
​ | ​ | Recorded Investment | ​ | Allowance for Loan Losses
​ | ​ | Individually | ​ | Collectively | ​ | ​ | ​ | ​ | Individually | ​ | Collectively | ​ | ​ | ​
(dollars in thousands) |  | Evaluated |  | Evaluated |  | Total |  | Evaluated |  | Evaluated |  | Total
Commercial | ​ | ​ |  |  | ​ |  |  | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial and industrial | ​ | $ | 2,161 | ​ | $ | 504,438 | ​ | $ | 506,599 | ​ | $ | 536 | ​ | $ | 8,564 | ​ | $ | 9,100
Real estate construction | ​ |  | — | ​ |  | 37,751 | ​ |  | 37,751 | ​ | ​ | — | ​ | ​ | 679 | ​ | ​ | 679
Commercial real estate | ​ |  | 4,493 | ​ |  | 569,025 | ​ |  | 573,518 | ​ | ​ | 11 | ​ | ​ | 12,513 | ​ | ​ | 12,524
Total commercial | ​ |  | 6,654 | ​ |  | 1,111,214 | ​ |  | 1,117,868 | ​ | ​ | 547 | ​ | ​ | 21,756 | ​ | ​ | 22,303
Consumer | ​ |  |  | ​ |  |  | ​ |  |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential real estate first mortgage | ​ |  | 121 | ​ |  | 501,218 | ​ |  | 501,339 | ​ | ​ | — | ​ | ​ | 6,801 | ​ | ​ | 6,801
Residential real estate junior lien | ​ |  | 172 | ​ |  | 130,071 | ​ |  | 130,243 | ​ | ​ | 8 | ​ | ​ | 1,415 | ​ | ​ | 1,423
Other revolving and installment | ​ |  | 4 | ​ |  | 50,932 | ​ |  | 50,936 | ​ | ​ | 4 | ​ | ​ | 519 | ​ | ​ | 523
Total consumer | ​ |  | 297 | ​ |  | 682,221 | ​ |  | 682,518 | ​ | ​ | 12 | ​ | ​ | 8,735 | ​ | ​ | 8,747
Unallocated | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,016
Total loans | ​ | $ | 6,951 | ​ | $ | 1,793,435 | ​ | $ | 1,800,386 | ​ | $ | 559 | ​ | $ | 30,491 | ​ | $ | 32,066
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ | ​ | Recorded Investment | ​ | Allowance for Loan Losses
​ | ​ | Individually | ​ | Collectively | ​ | ​ | ​ | ​ | Individually | ​ | Collectively | ​ | ​ | ​
(dollars in thousands) |  | Evaluated |  | Evaluated |  | Total |  | Evaluated |  | Evaluated |  | Total
Commercial | ​ | ​ |  |  | ​ |  |  | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial and industrial | ​ | $ | 2,616 | ​ | $ | 689,242 | ​ | $ | 691,858 | ​ | $ | 336 | ​ | $ | 9,869 | ​ | $ | 10,205
Real estate construction | ​ |  | — | ​ |  | 44,451 | ​ |  | 44,451 | ​ | ​ | — | ​ | ​ | 658 | ​ | ​ | 658
Commercial real estate | ​ |  | 5,224 | ​ |  | 557,783 | ​ |  | 563,007 | ​ | ​ | 837 | ​ | ​ | 13,268 | ​ | ​ | 14,105
Total commercial | ​ |  | 7,840 | ​ |  | 1,291,476 | ​ |  | 1,299,316 | ​ | ​ | 1,173 | ​ | ​ | 23,795 | ​ | ​ | 24,968
Consumer | ​ |  |  | ​ |  |  | ​ |  |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential real estate first mortgage | ​ |  | 439 | ​ |  | 462,931 | ​ |  | 463,370 | ​ | ​ | — | ​ | ​ | 5,774 | ​ | ​ | 5,774
Residential real estate junior lien | ​ |  | 224 | ​ | ​ | 143,192 | ​ |  | 143,416 | ​ | ​ | 19 | ​ | ​ | 1,354 | ​ | ​ | 1,373
Other revolving and installment | ​ |  | 27 | ​ |  | 73,246 | ​ |  | 73,273 | ​ | ​ | 13 | ​ | ​ | 740 | ​ | ​ | 753
Total consumer | ​ |  | 690 | ​ |  | 679,369 | ​ |  | 680,059 | ​ | ​ | 32 | ​ | ​ | 7,868 | ​ | ​ | 7,900
Unallocated | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1,378
Total loans | ​ | $ | 8,530 | ​ | $ | 1,970,845 | ​ | $ | 1,979,375 | ​ | $ | 1,205 | ​ | $ | 31,663 | ​ | $ | 34,246
Schedule of impaired loans | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2021 |  | December 31, 2020
​ | ​ | Recorded | ​ | Unpaid | ​ | Related |  | Recorded | ​ | Unpaid | ​ | Related
(dollars in thousands) |  | Investment |  | Principal |  | Allowance |  | Investment |  | Principal |  | Allowance
Impaired loans with a valuation allowance | ​ |  |  | ​ |  |  | ​ |  |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial and industrial | ​ | $ | 710 | ​ | $ | 725 | ​ | $ | 536 | ​ | $ | 723 | ​ | $ | 725 | ​ | $ | 336
Commercial real estate | ​ |  | 777 | ​ |  | 920 | ​ |  | 11 | ​ |  | 3,948 | ​ |  | 3,974 | ​ |  | 837
Residential real estate junior lien | ​ |  | 8 | ​ |  | 8 | ​ | ​ | 8 | ​ | ​ | 19 | ​ |  | 20 | ​ | ​ | 19
Other revolving and installment | ​ |  | 4 | ​ |  | 4 | ​ |  | 4 | ​ | ​ | 27 | ​ |  | 27 | ​ |  | 13
Total impaired loans with a valuation allowance | ​ | ​ | 1,499 | ​ | ​ | 1,657 | ​ | ​ | 559 | ​ | ​ | 4,717 | ​ | ​ | 4,746 | ​ | ​ | 1,205
Impaired loans without a valuation allowance |  | ​ |  |  | ​ |  |  | ​ |  | ​ | ​ |  |  | ​ |  |  | ​ |
Commercial and industrial | ​ | ​ | 1,451 | ​ | ​ | 1,603 | ​ | ​ | — | ​ | ​ | 1,893 | ​ | ​ | 2,173 | ​ | ​ | —
Commercial real estate | ​ |  | 3,716 | ​ | ​ | 3,872 | ​ |  | — | ​ | ​ | 1,276 | ​ |  | 1,415 | ​ |  | —
Residential real estate first mortgage | ​ |  | 121 | ​ |  | 123 | ​ |  | — | ​ | ​ | 439 | ​ |  | 464 | ​ |  | —
Residential real estate junior lien | ​ |  | 164 | ​ |  | 194 | ​ |  | — | ​ | ​ | 205 | ​ |  | 306 | ​ |  | —
Other revolving and installment | ​ |  | — | ​ |  | — | ​ |  | — | ​ | ​ | — | ​ |  | — | ​ |  | —
Total impaired loans without a valuation allowance | ​ | ​ | 5,452 | ​ | ​ | 5,792 | ​ | ​ | — | ​ | ​ | 3,813 | ​ | ​ | 4,358 | ​ | ​ | —
Total impaired loans | ​ |  |  | ​ |  |  | ​ |  |  | ​ | ​ |  | ​ |  |  | ​ |  |
Commercial and industrial | ​ | ​ | 2,161 | ​ | ​ | 2,328 | ​ | ​ | 536 | ​ | ​ | 2,616 | ​ | ​ | 2,898 | ​ | ​ | 336
Commercial real estate | ​ |  | 4,493 | ​ |  | 4,792 | ​ |  | 11 | ​ |  | 5,224 | ​ |  | 5,389 | ​ |  | 837
Residential real estate first mortgage | ​ | ​ | 121 | ​ | ​ | 123 | ​ | ​ | — | ​ | ​ | 439 | ​ | ​ | 464 | ​ | ​ | —
Residential real estate junior lien | ​ |  | 172 | ​ |  | 202 | ​ |  | 8 | ​ |  | 224 | ​ |  | 326 | ​ |  | 19
Other revolving and installment | ​ |  | 4 | ​ |  | 4 | ​ |  | 4 | ​ |  | 27 | ​ |  | 27 | ​ |  | 13
Total impaired loans | ​ | $ | 6,951 | ​ | $ | 7,449 | ​ | $ | 559 | ​ | $ | 8,530 | ​ | $ | 9,104 | ​ | $ | 1,205
​ The table below presents the average recorded investment in impaired loans and interest income for the three and nine months ended September 30, 2021 and 2020:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended September 30,
​ | ​ | 2021 | ​ | 2020
​ | ​ | Average | ​ | ​ | ​ | ​ | Average | ​ | ​ | ​
​ | ​ | Recorded | ​ | Interest | ​ | Recorded | ​ | Interest
(dollars in thousands) |  | Investment |  | Income |  | Investment |  | Income
Impaired loans with a valuation allowance | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial and industrial | ​ | $ | 719 | ​ | $ | 3 | ​ | $ | 2,541 | ​ | $ | 14
Commercial real estate | ​ | ​ | 779 | ​ | ​ | 2 | ​ | ​ | 197 | ​ | ​ | 8
Residential real estate first mortgage | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Residential real estate junior lien | ​ | ​ | 8 | ​ | ​ | — | ​ | ​ | 19 | ​ | ​ | —
Other revolving and installment | ​ | ​ | 4 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Total impaired loans with a valuation allowance | ​ | ​ | 1,510 | ​ | ​ | 5 | ​ | ​ | 2,757 | ​ | ​ | 22
Impaired loans without a valuation allowance |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial and industrial | ​ | ​ | 2,016 | ​ | ​ | 5 | ​ | ​ | 1,013 | ​ | ​ | 24
Commercial real estate | ​ | ​ | 3,793 | ​ | ​ | — | ​ | ​ | 1,330 | ​ | ​ | —
Residential real estate first mortgage | ​ | ​ | 121 | ​ | ​ | — | ​ | ​ | 459 | ​ | ​ | —
Residential real estate junior lien | ​ | ​ | 166 | ​ | ​ | — | ​ | ​ | 211 | ​ | ​ | 3
Other revolving and installment | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Total impaired loans without a valuation allowance | ​ | ​ | 6,096 | ​ | ​ | 5 | ​ | ​ | 3,013 | ​ | ​ | 27
Total impaired loans | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Commercial and industrial | ​ | ​ | 2,735 | ​ | ​ | 8 | ​ | ​ | 3,554 | ​ | ​ | 38
Commercial real estate | ​ | ​ | 4,572 | ​ | ​ | 2 | ​ | ​ | 1,527 | ​ | ​ | 8
Residential real estate first mortgage | ​ | ​ | 121 | ​ | ​ | — | ​ | ​ | 459 | ​ | ​ | —
Residential real estate junior lien | ​ | ​ | 174 | ​ | ​ | — | ​ | ​ | 230 | ​ | ​ | 3
Other revolving and installment | ​ | ​ | 4 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Total impaired loans | ​ | $ | 7,606 | ​ | $ | 10 | ​ | $ | 5,770 | ​ | $ | 49
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Nine Months Ended September 30,
​ | ​ | 2021 | ​ | 2020
​ | ​ | Average | ​ | ​ | ​ | ​ | Average | ​ | ​ | ​
​ | ​ | Recorded | ​ | Interest | ​ | Recorded | ​ | Interest
(dollars in thousands) |  | Investment |  | Income |  | Investment |  | Income
Impaired loans with a valuation allowance | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Commercial and industrial | ​ | $ | 818 | ​ | $ | 10 | ​ | $ | 3,815 | ​ | $ | 14
Commercial real estate | ​ |  | 782 | ​ |  | 6 | ​ |  | 200 | ​ |  | 8
Residential real estate junior lien | ​ |  | 11 | ​ |  | — | ​ |  | 20 | ​ |  | —
Other revolving and installment | ​ |  | 3 | ​ |  | — | ​ |  | — | ​ |  | —
Total impaired loans with a valuation allowance | ​ | ​ | 1,614 | ​ | ​ | 16 | ​ | ​ | 4,035 | ​ | ​ | 22
Impaired loans without a valuation allowance | ​ | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Commercial and industrial | ​ | ​ | 2,061 | ​ | ​ | 15 | ​ | ​ | 1,154 | ​ | ​ | 26
Commercial real estate | ​ |  | 3,980 | ​ |  | — | ​ |  | 1,699 | ​ |  | —
Residential real estate first mortgage | ​ |  | 114 | ​ |  | — | ​ |  | 467 | ​ |  | —
Residential real estate junior lien | ​ |  | 190 | ​ |  | — | ​ |  | 217 | ​ | ​ | 3
Other revolving and installment | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | —
Total impaired loans without a valuation allowance | ​ | ​ | 6,345 | ​ | ​ | 15 | ​ | ​ | 3,537 | ​ | ​ | 29
Total impaired loans | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Commercial and industrial | ​ | ​ | 2,879 | ​ | ​ | 25 | ​ | ​ | 4,969 | ​ | ​ | 40
Commercial real estate | ​ |  | 4,762 | ​ |  | 6 | ​ |  | 1,899 | ​ |  | 8
Residential real estate first mortgage | ​ |  | 114 | ​ |  | — | ​ |  | 467 | ​ |  | —
Residential real estate junior lien | ​ |  | 201 | ​ |  | — | ​ |  | 237 | ​ |  | 3
Other revolving and installment | ​ |  | 3 | ​ |  | — | ​ |  | — | ​ |  | —
Total impaired loans | ​ | $ | 7,959 | ​ | $ | 31 | ​ | $ | 7,572 | ​ | $ | 51

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