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Income Taxes - Summary of Provision for Federal Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Abstract]                              
Federal tax based on statutory rate                         $ 10,658 $ 8,994 $ 12,773
State tax based on statutory rate                         175 151 97
(Decrease) increase resulting from:                              
HTC                         (303) 0 0
NMTC                         (480) (480) (480)
Effect of tax-exempt income                         (155) (276) (196)
Changes in the cash surrender value of bank owned life insurance                         (219) (192) (547)
Nondeductible merger-related expenses                         0 41 30
Nondeductible share based compensation expense                         161 188 180
Exercise of stock options                         (50) (37) (23)
Other                         119 41 (16)
Total income tax expense $ 2,106 $ 2,465 $ 2,503 $ 2,832 $ 2,681 $ 2,598 $ 2,110 $ 1,041 $ 2,577 $ 3,412 $ 2,865 $ 2,964 $ 9,906 $ 8,430 $ 11,818
Effective tax rate (as percent)                         19.80% 19.80% 19.60%