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Earnings Per Share - Summary of Earnings Per Common Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ 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
Numerator:                              
Income applicable to common shares $ 9,385 $ 9,754 $ 9,781 $ 11,320 $ 10,776 $ 10,434 $ 8,461 $ 4,401 $ 10,238 $ 15,059 $ 11,396 $ 11,928 $ 40,240 $ 34,072 $ 48,621
Denominator:                              
Weighted average common shares outstanding (in shares)                         8,028 8,139 8,379
Effect of dilutive securities:                              
Weighted average common shares outstanding-assuming dilution (in shares)                         8,065 8,194 8,428
Earnings per common share (in usd per share) $ 1.18 $ 1.22 $ 1.22 $ 1.40 $ 1.33 $ 1.29 $ 1.04 $ 0.53 $ 1.24 $ 1.80 $ 1.35 $ 1.41 $ 5.02 $ 4.19 $ 5.80
Earnings per common share-assuming dilution (in usd per share) $ 1.17 $ 1.22 $ 1.21 $ 1.39 $ 1.32 $ 1.28 $ 1.03 $ 0.53 $ 1.23 $ 1.79 $ 1.34 $ 1.41 $ 4.99 $ 4.16 $ 5.77
Restricted stock                              
Effect of dilutive securities:                              
Restricted stock / Stock options (in shares)                         15 13 12
Stock options                              
Effect of dilutive securities:                              
Restricted stock / Stock options (in shares)                         22 42 37