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Business Combination & Asset Purchase - Schedule of Pro-forma Results (Detail) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Summary of Operations |  |
Net Interest Income - Before Provision for Loan Losses | $ 53,547 | $ 54,234
Provision for Loan Losses | 1,138 | 579
Net Interest Income After Provision for Loan Losses | 52,409 | 53,655
Noninterest Income | 11,820 | 11,750
Noninterest Expense | 40,314 | 40,517
Income Before Income Taxes | 23,915 | 24,888
Income Taxes | 4,484 | 4,530
Net Income | $ 19,431 | $ 20,358
Basic and Diluted Earnings Per Share | $ 1.75 | $ 1.83

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