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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 | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | $ 58,223 | $ 58,474 | $ 59,093 | $ 54,655 | $ 54,655
Provision for credit loss expense | 458 | 907 | (359) | 3,859 | 4,806
Loans charged off | 580 | 571 | 1,060 | 1,345 | 2,950
Recoveries collected | 618 | 265 | 1,045 | 1,043 | 1,719
Allowance for credit losses, Ending Balance | 58,719 | 59,075 | 58,719 | 59,075 | 59,093
Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13 |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance |  |  |  | 863 | 863
Construction and Land Development | Real Estate Loan |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 2,426 | 1,988 | 2,250 | 1,743 | 1,743
Provision for credit loss expense | (204) | 54 | (28) | 29 | 137
Loans charged off | 14 | 0 | 14 | 2 | 2
Recoveries collected | 0 | 0 | 0 | 0 | 100
Allowance for credit losses, Ending Balance | 2,208 | 2,042 | 2,208 | 2,042 | 2,250
Construction and Land Development | Real Estate Loan | Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13 |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance |  |  |  | 272 | 272
Agricultural | Real Estate Loan |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 1,404 | 1,971 | 1,433 | 1,257 | 1,257
Provision for credit loss expense | (34) | 141 | (63) | 855 | 176
Loans charged off | 0 | 0 | 0 | 0 | 0
Recoveries collected | 0 | 0 | 0 | 0 | 0
Allowance for credit losses, Ending Balance | 1,370 | 2,112 | 1,370 | 2,112 | 1,433
Agricultural | Real Estate Loan | Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13 |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance |  |  |  | 0 | 0
Residential Properties | Real Estate Loan | 1-4 Family |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 3,420 | 3,728 | 3,742 | 2,330 | 2,330
Provision for credit loss expense | (235) | (178) | (541) | 1,086 | 1,241
Loans charged off | 16 | 69 | 56 | 141 | 191
Recoveries collected | 78 | 42 | 102 | 245 | 359
Allowance for credit losses, Ending Balance | 3,247 | 3,523 | 3,247 | 3,523 | 3,742
Residential Properties | Real Estate Loan | 1-4 Family | Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13 |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance |  |  |  | 3 | 3
Commercial | Real Estate Loan |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 27,327 | 30,345 | 28,157 | 26,246 | 26,246
Provision for credit loss expense | 385 | (1,433) | (449) | 2,180 | 1,462
Loans charged off | 25 | 68 | 25 | 407 | 414
Recoveries collected | 327 | 12 | 331 | 359 | 385
Allowance for credit losses, Ending Balance | 28,014 | 28,856 | 28,014 | 28,856 | 28,157
Commercial | Real Estate Loan | Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13 |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance |  |  |  | 478 | 478
Agricultural Loans |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 580 | 1,051 | 585 | 983 | 983
Provision for credit loss expense | 213 | (72) | 205 | (4) | (359)
Loans charged off | 276 | 93 | 276 | 93 | 93
Recoveries collected | 7 | 0 | 10 | 0 | 54
Allowance for credit losses, Ending Balance | 524 | 886 | 524 | 886 | 585
Agricultural Loans | Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13 |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance |  |  |  | 0 | 0
Commercial and Industrial Loans |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 21,142 | 17,348 | 20,808 | 19,241 | 19,241
Provision for credit loss expense | 414 | 2,117 | 505 | 72 | 2,135
Loans charged off | 49 | 32 | 62 | 35 | 870
Recoveries collected | 37 | 63 | 293 | 124 | 208
Allowance for credit losses, Ending Balance | 21,544 | 19,496 | 21,544 | 19,496 | 20,808
Commercial and Industrial Loans | Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13 |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance |  |  |  | 94 | 94
Consumer Loans |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 1,924 | 2,043 | 2,118 | 2,855 | 2,855
Provision for credit loss expense | (81) | 278 | 12 | (359) | 14
Loans charged off | 200 | 309 | 627 | 667 | 1,380
Recoveries collected | 169 | 148 | 309 | 315 | 613
Allowance for credit losses, Ending Balance | $ 1,812 | $ 2,160 | $ 1,812 | 2,160 | 2,118
Consumer Loans | Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13 |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance |  |  |  | $ 16 | $ 16

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