Earnings Per Share - Summary of Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share [Abstract]
Net income applicable to common stock	$ 25,765	$ 26,494
Weighted average number of common shares outstanding	6,281,000	6,320,000
Basic earnings per share	$ 4.1	$ 4.19
Dilutive effect on common shares outstanding	108	129
Weighted average number of diluted common shares outstanding	6,389	6,449
Diluted earnings per share	$ 4.03	$ 4.11