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Summary of Significant Accounting Policies - Narrative (Details) | 12 Months Ended
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Dec. 31, 2024 USD ($) office segment branch | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Property, Plant and Equipment [Line Items] |  |  |
Branches operated | branch | 46 |  |
Number of loan production offices | office | 9 |  |
Cash Reserve Deposit Required and Made | $ 0 | $ 0 |
Number of portfolio segments | segment | 4 |  |
Allowance for Credit Losses, Qualitative Factor Adjustment | 0.25% |  |
Financing receivable, balance threshold to determine individual evaluation for impairment | $ 1,000,000 |  |
Retained earnings | 1,181,533,000 | 1,150,547,000 |
Deferred tax assets, net | $ 140,044,000 | 135,215,000 |
Average Servicing Asset Cost, Percentage | 0.32% |  |
Weighted average cost to service loans, per loan | $ 75.01 |  |
Servicing Asset at Amortized Cost, Other than Temporary Impairments | 0 | 0 | $ 0
Proceeds from sales of OREO | 63,000 | 2,109,000 | 524,000
Payments of Ordinary Dividends | 67,511,000 | 67,125,000 | $ 67,126,000
Loss contingencies for all legal claims | 664,000 | $ 535,000 |
Cumulative Effect, Period of Adoption, Adjustment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Derecognition of Delayed Contribution Liability, Investments in Affordable Housing Partnerships | 15,100,000 |  |
Retained earnings | 1,100,000 |  |
Deferred tax assets, net | $ 472,000 |  |
Minimum | Building |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 15 years |  |
Minimum | Furniture and Fixtures |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 3 years |  |
Minimum | Computer Equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 1 year |  |
Minimum | Computer Software, Intangible Asset |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 1 year |  |
Maximum | Core Deposits |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Amortization Period | 10 years |  |
Maximum | Building |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 39 years |  |
Maximum | Furniture and Fixtures |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 10 years |  |
Maximum | Computer Equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 5 years |  |
Maximum | Computer Software, Intangible Asset |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 5 years |  |

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