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Loans and Allowance for Credit Losses on Loans - Allowance for Credit Losses on Loans (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2022
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | $ 22,983 |  | $ 23,023
Provision (reversal) | 350 | $ 0 | (485)
(Charge-offs) | (14) |  | (2)
Recoveries | 11 |  | 11
Ending balance | 23,330 | 22,983 | 22,547
Commercial loans | Commercial and industrial |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 1,794 |  | 1,709
Provision (reversal) | 147 |  | 72
(Charge-offs) | (3) |  | 0
Recoveries | 3 |  | 3
Ending balance | 1,941 | 1,794 | 1,784
Commercial real estate loans | Commercial owner-occupied |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 2,487 |  | 2,776
Provision (reversal) | 153 |  | (154)
(Charge-offs) | 0 |  | 0
Recoveries | 0 |  | 0
Ending balance | 2,640 | 2,487 | 2,622
Commercial real estate loans | Commercial non-owner occupied |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 12,676 |  | 12,739
Provision (reversal) | 25 |  | (438)
(Charge-offs) | 0 |  | 0
Recoveries | 0 |  | 0
Ending balance | 12,701 | 12,676 | 12,301
Commercial real estate loans | Construction |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 1,937 |  | 1,653
Provision (reversal) | 74 |  | 56
(Charge-offs) | 0 |  | 0
Recoveries | 8 |  | 8
Ending balance | 2,019 | 1,937 | 1,717
Residential loans | Home equity |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 558 |  | 595
Provision (reversal) | (20) |  | (46)
(Charge-offs) | 0 |  | 0
Recoveries | 0 |  | 0
Ending balance | 538 | 558 | 549
Residential loans | Other residential |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 595 |  | 644
Provision (reversal) | (18) |  | (16)
(Charge-offs) | 0 |  | 0
Recoveries | 0 |  | 0
Ending balance | 577 | 595 | 628
Consumer loans | Installment and other consumer loans |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 868 |  | 621
Provision (reversal) | 25 |  | 22
(Charge-offs) | (11) |  | (2)
Recoveries | 0 |  | 0
Ending balance | 882 | 868 | 641
Unallocated |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |
Beginning balance | 2,068 |  | 2,286
Provision (reversal) | (36) |  | 19
(Charge-offs) | 0 |  | 0
Recoveries | 0 |  | 0
Ending balance | $ 2,032 | $ 2,068 | $ 2,305

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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
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