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Loans - Analysis of Allowance for Credit Losses (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
ALLOWANCE FOR CREDIT LOSSES: |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | $ 14,313 |  |  |  | $ 7,707 | $ 14,313 | $ 7,707 |
Charge Offs |  |  |  |  |  |  |  |  | (1,332) | (720) | $ (841)
Recoveries |  |  |  |  |  |  |  |  | 458 | 183 | 156
Provision (Credit) | $ 444 | $ 659 | $ 641 | 1,700 | $ 1,995 | $ 1,987 | $ 1,569 | 1,430 | 3,444 | 6,981 | 1,138
Other Non-interest expense related to unfunded |  |  |  |  |  |  |  |  | 400 | 162 |
Ending Balance | 17,283 |  |  |  | 14,313 |  |  |  | 17,283 | 14,313 | 7,707
Ending balance: individually evaluated for impairment | 2,184 |  |  |  | 1,657 |  |  |  | 2,184 | 1,657 |
Ending balance: collectively evaluated for impairment | 15,099 |  |  |  | 12,656 |  |  |  | 15,099 | 12,656 |
Ending balance: loans acquired with deteriorated credit quality | 37 |  |  |  | 0 |  |  |  | 37 | 0 |
FINANCING RECEIVABLES: |  |  |  |  |  |  |  |  |  |  |
Ending balance | 1,857,419 |  |  |  | 1,302,990 |  |  |  | 1,857,419 | 1,302,990 |
Ending balance: individually evaluated for impairment | 11,939 |  |  |  | 14,532 |  |  |  | 11,939 | 14,532 |
Ending balance: collectively evaluated for impairment | 1,844,031 |  |  |  | 1,288,310 |  |  |  | 1,844,031 | 1,288,310 |
Ending balance: loans acquired with deteriorated credit quality | 1,449 |  |  |  | 148 |  |  |  | 1,449 | 148 |
Consumer Real Estate [Member] |  |  |  |  |  |  |  |  |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 633 |  |  |  | 311 | 633 | 311 |
Charge Offs |  |  |  |  |  |  |  |  | (19) | (35) |
Recoveries |  |  |  |  |  |  |  |  | 13 | 9 |
Provision (Credit) |  |  |  |  |  |  |  |  | 230 | 348 |
Ending Balance | 857 |  |  |  | 633 |  |  |  | 857 | 633 | 311
Ending balance: individually evaluated for impairment |  |  |  |  | 31 |  |  |  |  | 31 |
Ending balance: collectively evaluated for impairment | 857 |  |  |  | 602 |  |  |  | 857 | 602 |
Ending balance: loans acquired with deteriorated credit quality | 37 |  |  |  | 0 |  |  |  | 37 | 0 |
FINANCING RECEIVABLES: |  |  |  |  |  |  |  |  |  |  |
Ending balance | 395,805 |  |  |  | 175,316 |  |  |  | 395,805 | 175,316 |
Ending balance: individually evaluated for impairment | 604 |  |  |  | 1,001 |  |  |  | 604 | 1,001 |
Ending balance: collectively evaluated for impairment | 394,489 |  |  |  | 174,273 |  |  |  | 394,489 | 174,273 |
Ending balance: loans acquired with deteriorated credit quality | 712 |  |  |  | 42 |  |  |  | 712 | 42 |
Agricultural Real Estate [Member] |  |  |  |  |  |  |  |  |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 958 |  |  |  | 314 | 958 | 314 |
Charge Offs |  |  |  |  |  |  |  |  | (105) |  |
Provision (Credit) |  |  |  |  |  |  |  |  | 187 | 644 |
Ending Balance | 1,040 |  |  |  | 958 |  |  |  | 1,040 | 958 | 314
Ending balance: individually evaluated for impairment | 691 |  |  |  | 600 |  |  |  | 691 | 600 |
Ending balance: collectively evaluated for impairment | 349 |  |  |  | 358 |  |  |  | 349 | 358 |
Ending balance: loans acquired with deteriorated credit quality | 0 |  |  |  | 0 |  |  |  | 0 | 0 |
FINANCING RECEIVABLES: |  |  |  |  |  |  |  |  |  |  |
Ending balance | 198,033 |  |  |  | 188,826 |  |  |  | 198,033 | 188,826 |
Ending balance: individually evaluated for impairment | 6,725 |  |  |  | 6,756 |  |  |  | 6,725 | 6,756 |
Ending balance: collectively evaluated for impairment | 191,107 |  |  |  | 182,070 |  |  |  | 191,107 | 182,070 |
Ending balance: loans acquired with deteriorated credit quality | 201 |  |  |  |  |  |  |  | 201 |  |
Agricultural [Member] |  |  |  |  |  |  |  |  |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 701 |  |  |  | 691 | 701 | 691 |
Charge Offs |  |  |  |  |  |  |  |  | (143) |  |
Recoveries |  |  |  |  |  |  |  |  | 14 |  |
Provision (Credit) |  |  |  |  |  |  |  |  | 137 | 10 |
Ending Balance | 709 |  |  |  | 701 |  |  |  | 709 | 701 | 691
Ending balance: individually evaluated for impairment | 1 |  |  |  | 116 |  |  |  | 1 | 116 |
Ending balance: collectively evaluated for impairment | 708 |  |  |  | 585 |  |  |  | 708 | 585 |
Ending balance: loans acquired with deteriorated credit quality | 0 |  |  |  | 0 |  |  |  | 0 | 0 |
FINANCING RECEIVABLES: |  |  |  |  |  |  |  |  |  |  |
Ending balance | 118,504 |  |  |  | 94,490 |  |  |  | 118,504 | 94,490 |
Ending balance: individually evaluated for impairment | 20 |  |  |  | 467 |  |  |  | 20 | 467 |
Ending balance: collectively evaluated for impairment | 118,484 |  |  |  | 94,023 |  |  |  | 118,484 | 94,023 |
Commercial Real Estate [Member] |  |  |  |  |  |  |  |  |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 7,415 |  |  |  | 3,634 | 7,415 | 3,634 |
Charge Offs |  |  |  |  |  |  |  |  |  | (8) |
Recoveries |  |  |  |  |  |  |  |  | 10 | 10 |
Provision (Credit) |  |  |  |  |  |  |  |  | 1,705 | 3,779 |
Ending Balance | 9,130 |  |  |  | 7,415 |  |  |  | 9,130 | 7,415 | 3,634
Ending balance: individually evaluated for impairment | 664 |  |  |  | 20 |  |  |  | 664 | 20 |
Ending balance: collectively evaluated for impairment | 8,466 |  |  |  | 7,395 |  |  |  | 8,466 | 7,395 |
Ending balance: loans acquired with deteriorated credit quality | 0 |  |  |  | 0 |  |  |  | 0 | 0 |
FINANCING RECEIVABLES: |  |  |  |  |  |  |  |  |  |  |
Ending balance | 847,110 |  |  |  | 587,654 |  |  |  | 847,110 | 587,654 |
Ending balance: individually evaluated for impairment | 3,561 |  |  |  | 2,950 |  |  |  | 3,561 | 2,950 |
Ending balance: collectively evaluated for impairment | 843,299 |  |  |  | 584,704 |  |  |  | 843,299 | 584,704 |
Ending balance: loans acquired with deteriorated credit quality | 250 |  |  |  |  |  |  |  | 250 |  |
Commercial and Industrial [Member] |  |  |  |  |  |  |  |  |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 3,346 |  |  |  | 1,727 | 3,346 | 1,727 |
Charge Offs |  |  |  |  |  |  |  |  | (814) | (297) |
Recoveries |  |  |  |  |  |  |  |  | 257 | 24 |
Provision (Credit) |  |  |  |  |  |  |  |  | 1,058 | 1,892 |
Ending Balance | 3,847 |  |  |  | 3,346 |  |  |  | 3,847 | 3,346 | 1,727
Ending balance: individually evaluated for impairment | 825 |  |  |  | 890 |  |  |  | 825 | 890 |
Ending balance: collectively evaluated for impairment | 3,022 |  |  |  | 2,456 |  |  |  | 3,022 | 2,456 |
Ending balance: loans acquired with deteriorated credit quality | 0 |  |  |  | 0 |  |  |  | 0 | 0 |
FINANCING RECEIVABLES: |  |  |  |  |  |  |  |  |  |  |
Ending balance | 240,138 |  |  |  | 204,043 |  |  |  | 240,138 | 204,043 |
Ending balance: individually evaluated for impairment | 1,003 |  |  |  | 3,335 |  |  |  | 1,003 | 3,335 |
Ending balance: collectively evaluated for impairment | 238,849 |  |  |  | 200,602 |  |  |  | 238,849 | 200,602 |
Ending balance: loans acquired with deteriorated credit quality | 286 |  |  |  | 106 |  |  |  | 286 | 106 |
Consumer [Member] |  |  |  |  |  |  |  |  |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 606 |  |  |  | 551 | 606 | 551 |
Charge Offs |  |  |  |  |  |  |  |  | (251) | (380) |
Recoveries |  |  |  |  |  |  |  |  | 164 | 140 |
Provision (Credit) |  |  |  |  |  |  |  |  | 106 | 295 |
Ending Balance | 625 |  |  |  | 606 |  |  |  | 625 | 606 | 551
Ending balance: individually evaluated for impairment | 3 |  |  |  |  |  |  |  | 3 |  |
Ending balance: collectively evaluated for impairment | 622 |  |  |  | 606 |  |  |  | 622 | 606 |
Ending balance: loans acquired with deteriorated credit quality | 0 |  |  |  | 0 |  |  |  | 0 | 0 |
FINANCING RECEIVABLES: |  |  |  |  |  |  |  |  |  |  |
Ending balance | 57,829 |  |  |  | 52,661 |  |  |  | 57,829 | 52,661 |
Ending balance: individually evaluated for impairment | 26 |  |  |  | 23 |  |  |  | 26 | 23 |
Ending balance: collectively evaluated for impairment | 57,803 |  |  |  | 52,638 |  |  |  | 57,803 | 52,638 |
Unallocated [Member] |  |  |  |  |  |  |  |  |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 13 |  |  |  |  | 13 |  |
Provision (Credit) |  |  |  |  |  |  |  |  | 21 | 13 |
Ending Balance | 34 |  |  |  | 13 |  |  |  | 34 | 13 |
Ending balance: collectively evaluated for impairment | 34 |  |  |  | 13 |  |  |  | 34 | 13 |
Ending balance: loans acquired with deteriorated credit quality | 0 |  |  |  | 0 |  |  |  | 0 | 0 |
Unfunded Loan Commitment & Letters of Credit [Member] |  |  |  |  |  |  |  |  |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | $ 641 |  |  |  | $ 479 | 641 | 479 |
Other Non-interest expense related to unfunded |  |  |  |  |  |  |  |  | 400 | 162 |
Ending Balance | 1,041 |  |  |  | 641 |  |  |  | 1,041 | 641 | $ 479
Ending balance: collectively evaluated for impairment | 1,041 |  |  |  | 641 |  |  |  | 1,041 | 641 |
Ending balance: loans acquired with deteriorated credit quality | $ 0 |  |  |  | $ 0 |  |  |  | $ 0 | $ 0 |

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