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Allowance for Credit Losses - Schedule of Impact Of CECL Adoption (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance $ 35,149   $ 28,511  
Charge-offs (666)   (855)  
Recoveries 167   320  
Provision 630   2,111  
Ending Balance 35,280   35,280  
Beginning balance   $ 27,435 28,511 $ 26,641
Charge-offs   (74)   (164)
Recoveries   112   296
Provision 630 300 2,111 1,000
Ending Balance   27,773   27,773
ASU 2016-13 [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance     897  
ASU 2016-13 [Member] | CECL Loans [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance     4,296  
Commercial and Agriculture [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance 5,540   3,011  
Charge-offs (614)   (754)  
Recoveries 84   131  
Provision 146   2,339  
Ending Balance 5,156   5,156  
Beginning balance   2,790 3,011 2,600
Charge-offs   (22)   (22)
Recoveries   12   16
Provision   (51)   135
Ending Balance   2,729   2,729
Commercial and Agriculture [Member] | ASU 2016-13 [Member] | CECL Loans [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance     429  
Commercial Real Estate Owner Occupied [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance 5,531   4,565  
Provision (50)   (178)  
Ending Balance 5,481   5,481  
Beginning balance   4,729 4,565 4,464
Recoveries   15   42
Provision   182   420
Ending Balance   4,926   4,926
Commercial Real Estate Owner Occupied [Member] | ASU 2016-13 [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance     19  
Commercial Real Estate Owner Occupied [Member] | ASU 2016-13 [Member] | CECL Loans [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance     1,075  
Commercial Real Estate Non Owner Occupied [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance 11,646   14,138  
Recoveries 9   25  
Provision (100)   239  
Ending Balance 11,555   11,555  
Beginning balance   14,711 14,138 13,860
Recoveries   16   68
Provision   (300)   499
Ending Balance   14,427   14,427
Commercial Real Estate Non Owner Occupied [Member] | ASU 2016-13 [Member] | CECL Loans [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance     (2,847)  
Residential Real Estate [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance 6,515   3,145  
Charge-offs (1)   (12)  
Recoveries 64   118  
Provision 253   652  
Ending Balance 6,831   6,831  
Beginning balance   2,859 3,145 2,597
Charge-offs   (39)   (97)
Recoveries   64   140
Provision   152   396
Ending Balance   3,036   3,036
Residential Real Estate [Member] | ASU 2016-13 [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance     166  
Residential Real Estate [Member] | ASU 2016-13 [Member] | CECL Loans [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance     2,762  
Real Estate Construction [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance 3,447   2,293  
Recoveries 4   13  
Provision 288   (69)  
Ending Balance 3,739   3,739  
Beginning balance   1,969 2,293 1,810
Provision   44   203
Ending Balance   2,013   2,013
Real Estate Construction [Member] | ASU 2016-13 [Member] | CECL Loans [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance     1,502  
Farm Real Estate [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance 243   291  
Provision (16)   (36)  
Ending Balance 227   227  
Beginning balance   236 291 287
Recoveries   1   5
Provision   14   (41)
Ending Balance   251   251
Farm Real Estate [Member] | ASU 2016-13 [Member] | CECL Loans [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance     (28)  
Lease Financing Receivables [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance 1,947   429  
Provision (115)   (975)  
Ending Balance 1,832   1,832  
Beginning balance     429  
Lease Financing Receivables [Member] | ASU 2016-13 [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance     635  
Lease Financing Receivables [Member] | ASU 2016-13 [Member] | CECL Loans [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance     1,743  
Consumer and Other [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance 272   98  
Charge-offs (51)   (89)  
Recoveries 6   33  
Provision 21   (72)  
Ending Balance 248   248  
Beginning balance   130 98 176
Charge-offs   (13)   (45)
Recoveries   4   25
Provision   21   (14)
Ending Balance   142   142
Consumer and Other [Member] | ASU 2016-13 [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance     77  
Consumer and Other [Member] | ASU 2016-13 [Member] | CECL Loans [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance     201  
Unallocated [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance 8   541  
Provision 203   211  
Ending Balance $ 211   211  
Beginning balance   11 541 847
Provision   238   (598)
Ending Balance   $ 249   $ 249
Unallocated [Member] | ASU 2016-13 [Member] | CECL Loans [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Beginning Balance     $ (541)