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Earnings Per Share - Summary of Earnings Per Share (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Earnings Per Share [Abstract]        
Net income applicable to common stock $ 7,598 $ 6,975 $ 20,483 $ 19,323
Weighted average number of common shares outstanding 6,295,000 6,269,000 6,275,000 6,345,000
Basic earnings per share $ 1.21 $ 1.12 $ 3.26 $ 3.05
Dilutive effect on common shares outstanding 95 109 105 130
Weighted average number of diluted common shares outstanding 6,390 6,378 6,380 6,475
Diluted earnings per share $ 1.19 $ 1.09 $ 3.21 $ 2.98