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INCOME TAXES - Reconciliation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Effective Income Tax Rate Reconciliation, Amount |  |  |
Income tax at federal statutory rate | $ 10,201 | $ 9,858 | $ 7,353
Tax effect of: |  |  |
State income taxes, net of federal income taxes | 1,099 | 1,435 | 2,101
Tax exempt earnings | (1,460) | (1,381) | (856)
Other | 42 | (380) | 0
Income tax expense | $ 9,882 | $ 9,532 | $ 8,598
Effective Income Tax Rate Reconciliation, Percent |  |  |
Income tax at federal statutory rate (percentage) | 21.00% | 21.00% | 21.00%
Tax effect of: |  |  |
State income taxes, net of federal income taxes (percentage) | 2.20% | 3.10% | 6.00%
Tax exempt earnings (percentage) | (3.00%) | (3.00%) | (2.80%)
Other (percentage) | 0.10% | (0.80%) | 0.00%
Income tax expense (as a percentage) | 20.30% | 20.30% | 24.20%

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