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Business Combination & Asset Purchase - Schedule of Pro-forma Results (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Summary of Operations      
Net Interest Income - Before Provision for Loan Losses $ 78,064 $ 74,378 $ 70,313
Provision for Loan Losses 3,445 6,893 1,400
Net Interest Income After Provision for Loan Losses 74,619 67,485 68,913
Noninterest Income 18,548 17,282 12,350
Noninterest Expense 54,540 51,890 48,686
Income Before Income Taxes 38,627 32,877 32,577
Income Taxes 7,712 6,475 6,696
Net Income $ 30,915 $ 26,402 $ 25,881
Basic and Diluted Earnings Per Share $ 2.65 $ 2.28 $ 2.24