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Loans and Allowance for Credit Losses - Allowance for Credit Losses Based on Portfolio Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | $ 68,312 | $ 58,719 | $ 68,675 | $ 59,093 | $ 59,093
Initial allowance on loans purchased with credit deterioration |  | 3,791 |  | 3,791 | 3,791
Provision for credit loss expense | 1,266 | 5,911 | 1,992 | 5,552 | 6,104
Loans charged off | 1,334 | 521 | 3,138 | 1,581 | 2,631
Recoveries collected | 530 | 341 | 1,245 | 1,386 | 2,318
Allowance for credit losses, Ending Balance | 68,774 | 68,241 | 68,774 | 68,241 | 68,675
Construction and Land Development | Real Estate Loan |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 2,646 | 2,208 | 2,918 | 2,250 | 2,250
Initial allowance on loans purchased with credit deterioration |  | 308 |  | 308 | 308
Provision for credit loss expense | 23 | 219 | (249) | 191 | 374
Loans charged off | 0 | 0 | 0 | 14 | 14
Recoveries collected | 5 | 0 | 5 | 0 | 0
Allowance for credit losses, Ending Balance | 2,674 | 2,735 | 2,674 | 2,735 | 2,918
Agricultural | Real Estate Loan |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 1,372 | 1,370 | 1,366 | 1,433 | 1,433
Initial allowance on loans purchased with credit deterioration |  | 0 |  | 0 | 0
Provision for credit loss expense | (30) | 27 | (24) | (36) | (67)
Loans charged off | 0 | 0 | 0 | 0 | 0
Recoveries collected | 0 | 0 | 0 | 0 | 0
Allowance for credit losses, Ending Balance | 1,342 | 1,397 | 1,342 | 1,397 | 1,366
Residential Properties | Real Estate Loan | 1-4 Family |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 3,580 | 3,247 | 4,220 | 3,742 | 3,742
Initial allowance on loans purchased with credit deterioration |  | 124 |  | 124 | 124
Provision for credit loss expense | 55 | 629 | (633) | 88 | 225
Loans charged off | 42 | 21 | 143 | 77 | 87
Recoveries collected | 88 | 91 | 237 | 193 | 216
Allowance for credit losses, Ending Balance | 3,681 | 4,070 | 3,681 | 4,070 | 4,220
Commercial | Real Estate Loan |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 32,918 | 28,014 | 31,758 | 28,157 | 28,157
Initial allowance on loans purchased with credit deterioration |  | 1,066 |  | 1,066 | 1,066
Provision for credit loss expense | 349 | 2,727 | 1,343 | 2,278 | 1,755
Loans charged off | 451 | 0 | 451 | 25 | 25
Recoveries collected | 9 | 16 | 175 | 347 | 805
Allowance for credit losses, Ending Balance | 32,825 | 31,823 | 32,825 | 31,823 | 31,758
Agricultural Loans |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 885 | 524 | 705 | 585 | 585
Initial allowance on loans purchased with credit deterioration |  | 0 |  | 0 | 0
Provision for credit loss expense | (50) | 245 | 391 | 450 | 490
Loans charged off | 0 | 132 | 261 | 408 | 408
Recoveries collected | 25 | 3 | 25 | 13 | 38
Allowance for credit losses, Ending Balance | 860 | 640 | 860 | 640 | 705
Commercial and Industrial Loans |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 24,931 | 21,544 | 25,450 | 20,808 | 20,808
Initial allowance on loans purchased with credit deterioration |  | 2,273 |  | 2,273 | 2,273
Provision for credit loss expense | 542 | 1,697 | 557 | 2,202 | 2,322
Loans charged off | 1 | 0 | 643 | 62 | 529
Recoveries collected | 97 | 81 | 205 | 374 | 576
Allowance for credit losses, Ending Balance | 25,569 | 25,595 | 25,569 | 25,595 | 25,450
Consumer Loans |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 1,980 | 1,812 | 2,258 | 2,118 | 2,118
Initial allowance on loans purchased with credit deterioration |  | 20 |  | 20 | 20
Provision for credit loss expense | 377 | 367 | 607 | 379 | 1,005
Loans charged off | 840 | 368 | 1,640 | 995 | 1,568
Recoveries collected | 306 | 150 | 598 | 459 | 683
Allowance for credit losses, Ending Balance | $ 1,823 | $ 1,981 | $ 1,823 | $ 1,981 | $ 2,258

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