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Earnings Per Share - Calculation of Basic Earnings Per Share (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
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, 2022
Dec. 31, 2021
Dec. 31, 2020
Earnings Per Share [Abstract]                      
Net income $ 7,188 $ 8,954 $ 8,271 $ 8,102 $ 7,683 $ 5,920 $ 4,983 $ 4,909 $ 32,515 $ 23,495 $ 20,095
Less: distributed earnings allocated to participating securities                 (97) (70) (57)
Less: undistributed earnings allocated to participating securities                 (187) (121) (96)
Net earnings available to common shareholders                 $ 32,231 $ 23,304 $ 19,942
Weighted average common shares outstanding including participating securities                 13,206,713 11,664,852 11,146,270
Less: average unvested restricted shares                 (115,291) (94,634) (84,879)
Weighted average common shares outstanding 13,606,876 12,983,307 12,957,126 12,955,107 13,046,299 11,209,732 11,191,043 11,197,012 13,091,422 11,570,218 11,061,391
Basic Earnings Per Share $ 0.53 $ 0.68 $ 0.63 $ 0.62 $ 0.59 $ 0.53 $ 0.44 $ 0.44 $ 2.46 $ 2.01 $ 1.80
Diluted Earnings Per Share $ 0.53 $ 0.68 $ 0.63 $ 0.62 $ 0.59 $ 0.53 $ 0.44 $ 0.44 $ 2.46 $ 2.01 $ 1.80