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Allowance for Credit Losses - Schedule of allowance for credit losses on off-balance sheet credit exposures (Detail) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Total allowance for credit losses | $ 34,196 | $ 28,511
Off-Balance Sheet Credit Exposures [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total allowance for credit losses | 3,587 |
Commercial and Agriculture [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total allowance for credit losses | 3,316 | 3,011
Commercial and Agriculture [Member] | Off-Balance Sheet Credit Exposures [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total allowance for credit losses | 648 |
Commercial Real Estate Owner Occupied [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total allowance for credit losses | 5,733 | 4,565
Commercial Real Estate Owner Occupied [Member] | Off-Balance Sheet Credit Exposures [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total allowance for credit losses | 91 |
Commercial Real Estate Non Owner Occupied [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total allowance for credit losses | 11,760 | 14,138
Commercial Real Estate Non Owner Occupied [Member] | Off-Balance Sheet Credit Exposures [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total allowance for credit losses | 159 |
Residential Real Estate [Member] | Off-Balance Sheet Credit Exposures [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total allowance for credit losses | 486 |
Real Estate Construction [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total allowance for credit losses | 3,920 | 2,293
Real Estate Construction [Member] | Off-Balance Sheet Credit Exposures [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total allowance for credit losses | 2,143 |
Farm Real Estate [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total allowance for credit losses | 269 | 291
Farm Real Estate [Member] | Off-Balance Sheet Credit Exposures [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total allowance for credit losses | 26 |
Lease Financing Receivables [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total allowance for credit losses | 2,907 | 429
Lease Financing Receivables [Member] | Off-Balance Sheet Credit Exposures [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total allowance for credit losses | 0 |
Consumer and Other [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total allowance for credit losses | 354 | $ 98
Consumer and Other [Member] | Off-Balance Sheet Credit Exposures [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total allowance for credit losses | $ 34 |

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- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(2)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (3) Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (c) Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) + Details
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