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Loans - Schedule of Impairment by Class of Loans (Detail)
$ in Thousands
12 Months Ended
Dec. 31, 2022
USD ($)
Financing Receivable, Impaired [Line Items]  
Unpaid Principal Balance $ 1,101
Recorded Investment With No Allowance 387
Recorded Investment With Allowance 659
Total Recorded Investment 1,046
Related Allowance 4
Average Recorded Investment 1,456
Interest Income Recognized 50
Commercial [Member]  
Financing Receivable, Impaired [Line Items]  
Unpaid Principal Balance 123
Recorded Investment With No Allowance 124
Total Recorded Investment 124
Average Recorded Investment 327
Interest Income Recognized 7
Commercial Real Estate [Member]  
Financing Receivable, Impaired [Line Items]  
Unpaid Principal Balance 117
Recorded Investment With No Allowance 92
Recorded Investment With Allowance 20
Total Recorded Investment 112
Average Recorded Investment 118
Interest Income Recognized 4
Residential Real Estate [Member]  
Financing Receivable, Impaired [Line Items]  
Unpaid Principal Balance 733
Recorded Investment With No Allowance 166
Recorded Investment With Allowance 518
Total Recorded Investment 683
Average Recorded Investment 758
Interest Income Recognized 31
Construction & Land Development [Member]  
Financing Receivable, Impaired [Line Items]  
Average Recorded Investment 123
Consumer [Member]  
Financing Receivable, Impaired [Line Items]  
Unpaid Principal Balance 127
Recorded Investment With No Allowance 6
Recorded Investment With Allowance 121
Total Recorded Investment 127
Related Allowance 4
Average Recorded Investment 130
Interest Income Recognized $ 8