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INCOME TAXES - Reconciliation (Details) - USD ($)
$ in Thousands
12 Months Ended
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%