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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, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Allowance for loan losses [Abstract] |  |  |  |  |
Allowance for credit losses, Beginning Balance | $ 58,474 | $ 55,418 | $ 54,655 | $ 41,910 | $ 41,910
Initial allowance on loans purchased with credit deterioration |  |  | 863 | 2,074 |
Provision for credit loss expense | 907 | (560) | 3,859 | 11,576 | 15,151
Loans charged off | 571 | 449 | 1,345 | 1,417 | 5,634
Recoveries collected | 265 | 188 | 1,043 | 454 | 1,154
Allowance for credit losses, Ending Balance | 59,075 | 54,597 | 59,075 | 54,597 | 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 | 1,988 | 2,286 | 1,743 | 1,666 | 1,666
Initial allowance on loans purchased with credit deterioration |  |  | 272 | 261 |
Provision for credit loss expense | 54 | (468) | 29 | (109) | 21
Loans charged off | 0 | 23 | 2 | 23 | 205
Recoveries collected | 0 | 0 | 0 | 0 | 0
Allowance for credit losses, Ending Balance | 2,042 | 1,795 | 2,042 | 1,795 | 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 | 1,971 | 1,628 | 1,257 | 1,084 | 1,084
Initial allowance on loans purchased with credit deterioration |  |  | 0 | 44 |
Provision for credit loss expense | 141 | 37 | 855 | 535 | 129
Loans charged off | 0 | 0 | 0 | 0 | 0
Recoveries collected | 0 | 0 | 0 | 2 | 0
Allowance for credit losses, Ending Balance | 2,112 | 1,665 | 2,112 | 1,665 | 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 | 3,728 | 3,093 | 2,330 | 2,322 | 2,322
Initial allowance on loans purchased with credit deterioration |  |  | 3 | 328 |
Provision for credit loss expense | (178) | (527) | 1,086 | 90 | (160)
Loans charged off | 69 | 14 | 141 | 196 | 371
Recoveries collected | 42 | 18 | 245 | 26 | 211
Allowance for credit losses, Ending Balance | 3,523 | 2,570 | 3,523 | 2,570 | 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 | 30,345 | 25,737 | 26,246 | 19,660 | 19,660
Initial allowance on loans purchased with credit deterioration |  |  | 478 | 646 |
Provision for credit loss expense | (1,433) | (86) | 2,180 | 5,816 | 6,415
Loans charged off | 68 | 0 | 407 | 480 | 535
Recoveries collected | 12 | 13 | 359 | 22 | 60
Allowance for credit losses, Ending Balance | 28,856 | 25,664 | 28,856 | 25,664 | 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 | 1,051 | 881 | 983 | 1,526 | 1,526
Initial allowance on loans purchased with credit deterioration |  |  | 0 | 0 |
Provision for credit loss expense | (72) | 24 | (4) | (621) | (544)
Loans charged off | 93 | 0 | 93 | 0 | 0
Recoveries collected | 0 | 1 | 0 | 1 | 1
Allowance for credit losses, Ending Balance | 886 | 906 | 886 | 906 | 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 | 17,348 | 18,954 | 19,241 | 13,485 | 13,485
Initial allowance on loans purchased with credit deterioration |  |  | 94 | 795 |
Provision for credit loss expense | 2,117 | 934 | 72 | 5,608 | 7,940
Loans charged off | 32 | 68 | 35 | 86 | 3,118
Recoveries collected | 63 | 22 | 124 | 40 | 139
Allowance for credit losses, Ending Balance | 19,496 | 19,842 | 19,496 | 19,842 | 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 | 2,043 | 2,839 | 2,855 | 2,167 | 2,167
Initial allowance on loans purchased with credit deterioration |  |  | 16 | 0 |
Provision for credit loss expense | 278 | (474) | (359) | 257 | 1,350
Loans charged off | 309 | 344 | 667 | 632 | 1,405
Recoveries collected | 148 | 134 | 315 | 363 | 743
Allowance for credit losses, Ending Balance | $ 2,160 | $ 2,155 | $ 2,160 | 2,155 | 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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