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Loans - Components of Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Jun. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | $ 5,787,622 |  | $ 4,133,267 |  |  |
Less: Unearned Income | (9,117) |  | (8,365) |  |  |
Allowance for Credit Losses | (76,057) | $ (76,105) | (44,436) | $ (44,124) | $ (43,946) | $ (43,765)
Loans, Net | 5,702,448 |  | 4,080,466 |  |  |
Commercial and Industrial Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 730,134 |  | 591,785 |  |  |
Allowance for Credit Losses | (17,633) | (17,739) | (7,059) | (6,974) | (7,200) | (7,921)
Commercial Real Estate Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 3,103,181 |  | 2,224,872 |  |  |
Allowance for Credit Losses | (39,132) | (38,803) | (25,818) | (26,656) | (26,598) | (25,923)
Agricultural Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 472,807 |  | 431,037 |  |  |
Allowance for Credit Losses | (3,228) | (3,130) | (4,917) | (3,901) | (3,697) | (3,837)
Leases |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 85,088 |  | 79,253 |  |  |
Allowance for Credit Losses | (1,176) | (1,192) | (397) | (396) | (368) | (346)
Home Equity Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 456,839 |  | 344,808 |  |  |
Allowance for Credit Losses | (4,314) | (4,334) | (2,196) | (2,130) | (2,058) | (1,834)
Consumer Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 119,642 |  | 81,396 |  |  |
Allowance for Credit Losses | (686) | (691) | (727) | (740) | (722) | (759)
Credit Cards |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 27,261 |  | 22,668 |  |  |
Allowance for Credit Losses | (673) | (621) | (520) | (466) | (413) | (383)
Residential Mortgage Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 792,670 |  | 357,448 |  |  |
Allowance for Credit Losses | (9,215) | $ (9,595) | (2,802) | $ (2,861) | $ (2,890) | $ (2,762)
Commercial: | Commercial and Industrial Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 730,134 |  | 591,785 |  |  |
Commercial: | Commercial Real Estate Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 3,103,181 |  | 2,224,872 |  |  |
Commercial: | Agricultural Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 472,807 |  | 431,037 |  |  |
Commercial: | Leases |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 85,088 |  | 79,253 |  |  |
Retail: | Home Equity Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 456,839 |  | 344,808 |  |  |
Retail: | Consumer Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 119,642 |  | 81,396 |  |  |
Retail: | Credit Cards |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 27,261 |  | 22,668 |  |  |
Retail: | Residential Mortgage Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | $ 792,670 |  | $ 357,448 |  |  |

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