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Loans and Allowance for Credit Losses - Narrative (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) loan | Dec. 31, 2020 USD ($) loan | Jan. 01, 2021 USD ($)
Receivables [Abstract] |  |  |
Loans held for sale | $ 11,187,000 | $ 3,966,000 |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans held for sale | 11,187,000 | 3,966,000 |
Loans | 9,241,861,000 | 9,243,174,000 |
Non-accrual loans | 43,062,000 | 61,471,000 |
Interest income recognized on non-accrual loans | 0 | 0 |
Amount modified under interagency statement | $ 14,083,000 | $ 4,473,000 |
Number of Loans | loan | 15 | 49 |
Standby letters of credit usual term | 2 years |  |
Allowance for credit losses on unfunded loan commitments | $ 20,500,000 | $ 0 | $ 20,500,000
PPP, CARES Act |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 106,600,000 | 667,100,000 |
Number of Loans | loan | 0 |  |
Commercial real estate, non-owner occupied |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 2,135,459,000 | 2,220,949,000 |
Non-accrual loans | 23,029,000 | 46,316,000 |
Amount modified under interagency statement | $ 12,976,000 |  |
Number of Loans | loan | 1 |  |
Percentage of troubled debt restructured loans | 9210.00% |  |
Residential Real Estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 1,159,127,000 | 1,234,741,000 |
Non-accrual loans | 9,153,000 | 6,517,000 |
Amount modified under interagency statement | $ 693,000 | $ 2,780,000 |
Number of Loans | loan | 9 | 38 |
Percentage of troubled debt restructured loans |  | 62.20% |
Mortgage loans with formal foreclosure proceedings | $ 4,200,000 | $ 2,800,000 |
CARES Act, Modifications |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount modified under interagency statement | 0 | $ 120,300,000 |
Number of Loans | loan |  | 87 |
Term Modification |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount modified under interagency statement | 13,802,000 | $ 3,868,000 |
Term Modification | Commercial real estate, non-owner occupied |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount modified under interagency statement | 12,976,000 |  |
Term Modification | Residential Real Estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Amount modified under interagency statement | 449,000 | 2,393,000 |
Impact of adopting ASC 326 |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans |  |  | 4,776,000
Allowance for credit losses on unfunded loan commitments | 20,500,000 |  | $ 20,500,000
Past Due |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | 34,700,000 | 72,800,000 |
Increase (decrease) in past due loans | 38,000,000 |  |
30-59 Days Past Due |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | 15,006,000 | 19,638,000 |
Increase (decrease) in past due loans | 4,600,000 |  |
30-59 Days Past Due | Commercial real estate, non-owner occupied |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | 3,327,000 | 2,525,000 |
30-59 Days Past Due | Residential Real Estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | 3,979,000 | 3,269,000 |
60-89 Days Past Due |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | 7,056,000 | 11,187,000 |
Increase (decrease) in past due loans | 4,100,000 |  |
60-89 Days Past Due | Commercial real estate, non-owner occupied |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | 0 | 2,109,000 |
60-89 Days Past Due | Residential Real Estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | 4,255,000 | 1,429,000 |
90 Days or More Past Due |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | 12,686,000 | 41,950,000 |
Increase (decrease) in past due loans | 29,300,000 |  |
90 Days or More Past Due | Commercial real estate, non-owner occupied |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | 7,279,000 | 31,634,000 |
Payoff | 23,400,000 |  |
90 Days or More Past Due | Residential Real Estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans | $ 2,599,000 | $ 3,264,000 |

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