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Business Combination and Asset Purchase - Schedule of Pro-forma Results (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Summary of Operations |  |  |  |
Net Interest Income - Before Provision for Loan Losses | $ 14,534 | $ 15,079 | $ 27,311 | $ 27,718
Provision for Loan Losses | 133 | 252 | 163 | 397
Net Interest Income After Provision for Loan Losses | 14,401 | 14,827 | 27,148 | 27,321
Noninterest Income | 2,981 | 2,965 | 5,676 | 5,727
Noninterest Expense | 9,753 | 9,373 | 19,977 | 18,719
Income Before Income Taxes | 7,629 | 8,419 | 12,847 | 14,329
Income Taxes | 1,480 | 1,632 | 2,445 | 2,740
Net Income | $ 6,149 | $ 6,787 | $ 10,402 | $ 11,589
Basic and Diluted Earnings Per Share | $ 0.56 | $ 0.61 | $ 0.94 | $ 1.04

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