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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, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | $ 59,075 | $ 54,597 | $ 54,655 | $ 41,910 | $ 41,910
Initial allowance on loans purchased with credit deterioration |  |  | 863 | 2,074 |
Provision for credit loss expense | 142 | 1,103 | 4,001 | 12,679 | 15,151
Loans charged off | 833 | 2,076 | 2,178 | 3,493 | 5,634
Recoveries collected | 393 | 359 | 1,436 | 813 | 1,154
Allowance for credit losses, Ending Balance | 58,777 | 53,983 | 58,777 | 53,983 | 54,655
Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13 |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance |  |  |  | 2,074 | 2,074
Construction and Land Development | Real Estate Loan |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 2,042 | 1,795 | 1,743 | 1,666 | 1,666
Initial allowance on loans purchased with credit deterioration |  |  | 272 | 261 |
Provision for credit loss expense | 1 | 314 | 30 | 205 | 21
Loans charged off | 0 | 0 | 2 | 23 | 205
Recoveries collected | 100 | 0 | 100 | 0 | 0
Allowance for credit losses, Ending Balance | 2,143 | 2,109 | 2,143 | 2,109 | 1,743
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 |  |  |  | 261 | 261
Agricultural | Real Estate Loan |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 2,112 | 1,665 | 1,257 | 1,084 | 1,084
Initial allowance on loans purchased with credit deterioration |  |  | 0 | 44 |
Provision for credit loss expense | (674) | (408) | 181 | 129 | 129
Loans charged off | 0 | 0 | 0 | 0 | 0
Recoveries collected | 0 | 0 | 0 | 0 | 0
Allowance for credit losses, Ending Balance | 1,438 | 1,257 | 1,438 | 1,257 | 1,257
Agricultural | Real Estate Loan | Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13 |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance |  |  |  | 44 | 44
Residential Properties | Real Estate Loan | 1-4 Family |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 3,523 | 2,570 | 2,330 | 2,322 | 2,322
Initial allowance on loans purchased with credit deterioration |  |  | 3 | 328 |
Provision for credit loss expense | 269 | 27 | 1,355 | 117 | (160)
Loans charged off | 45 | 45 | 186 | 241 | 371
Recoveries collected | 19 | 108 | 264 | 134 | 211
Allowance for credit losses, Ending Balance | 3,766 | 2,660 | 3,766 | 2,660 | 2,330
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 |  |  |  | 328 | 328
Commercial | Real Estate Loan |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 28,856 | 25,664 | 26,246 | 19,660 | 19,660
Initial allowance on loans purchased with credit deterioration |  |  | 478 | 646 |
Provision for credit loss expense | (796) | (52) | 1,384 | 5,764 | 6,415
Loans charged off | 7 | 55 | 414 | 535 | 535
Recoveries collected | 8 | 23 | 367 | 45 | 60
Allowance for credit losses, Ending Balance | 28,061 | 25,580 | 28,061 | 25,580 | 26,246
Commercial | Real Estate Loan | Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13 |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance |  |  |  | 646 | 646
Agricultural Loans |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 886 | 906 | 983 | 1,526 | 1,526
Initial allowance on loans purchased with credit deterioration |  |  | 0 | 0 |
Provision for credit loss expense | (246) | (90) | (250) | (711) | (544)
Loans charged off | 0 | 0 | 93 | 0 | 0
Recoveries collected | 38 | 0 | 38 | 1 | 1
Allowance for credit losses, Ending Balance | 678 | 816 | 678 | 816 | 983
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 | 19,496 | 19,842 | 19,241 | 13,485 | 13,485
Initial allowance on loans purchased with credit deterioration |  |  | 94 | 795 |
Provision for credit loss expense | 1,271 | 342 | 1,343 | 5,950 | 7,940
Loans charged off | 389 | 1,600 | 424 | 1,686 | 3,118
Recoveries collected | 63 | 24 | 187 | 64 | 139
Allowance for credit losses, Ending Balance | 20,441 | 18,608 | 20,441 | 18,608 | 19,241
Commercial and Industrial Loans | Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13 |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance |  |  |  | 795 | 795
Consumer Loans |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | 2,160 | 2,155 | 2,855 | 2,167 | 2,167
Initial allowance on loans purchased with credit deterioration |  |  | 16 | 0 |
Provision for credit loss expense | 317 | 970 | (42) | 1,225 | 1,350
Loans charged off | 392 | 376 | 1,059 | 1,008 | 1,405
Recoveries collected | 165 | 204 | 480 | 569 | 743
Allowance for credit losses, Ending Balance | $ 2,250 | $ 2,953 | $ 2,250 | 2,953 | 2,855
Consumer Loans | Cumulative Change in Accounting Principal, Adjustment | ASU 2016-13 |  |  |  |  |
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance |  |  |  | $ 0 | $ 0

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