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Business Combinations - Unaudited Pro Forma Condensed Combined Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Business Combinations [Abstract] |  |  |  |
Net interest income | $ 45,496 | $ 43,717 | $ 131,713 | $ 127,341
Provision for loan losses | 1,103 | 4,211 | 12,879 | 17,379
Non-interest income | 16,359 | 15,439 | 53,504 | 48,214
Non-interest expense | 36,321 | 36,100 | 124,133 | 113,461
Income before taxes | 24,431 | 18,845 | 48,205 | 44,715
Income tax expense (benefit) | 6,105 | 4,753 | 11,052 | 10,865
Net income (loss) | $ 18,326 | $ 14,092 | $ 37,153 | $ 33,850
Earnings per share |  |  |  |
Basic | $ 1.01 | $ 0.78 | $ 2.08 | $ 1.88
Diluted | $ 1.01 | $ 0.78 | $ 2.08 | $ 1.88
Basic weighted average shares o/s | 18,083,126 | 17,990,437 | 17,819,619 | 17,972,731
Diluted weighted average shares o/s | 18,136,146 | 18,037,345 | 17,872,639 | 18,019,639

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