Earnings Per Share - Calculation of Basic Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Net income	$ 6,516	$ 5,682	$ 5,359	$ 4,777	$ 6,001	$ 6,466	$ 17,557	$ 17,244
Less: distributed earnings allocated to participating securities	(36)			(33)			(108)	(95)
Less: undistributed earnings allocated to participating securities	(40)			(20)			(97)	(90)
Net earnings available to common shareholders	$ 6,440			$ 4,724			$ 17,352	$ 17,059
Weighted average common shares outstanding including participating securities	13,687,119			13,650,823			13,679,955	13,633,101
Less: average unvested restricted shares	(158,748)			(152,127)			(159,823)	(146,184)
Weighted average common shares outstanding	13,528,371			13,498,696			13,520,132	13,486,917
Basic earnings per share	$ 0.48			$ 0.35			$ 1.28	$ 1.26
Diluted earnings per share	$ 0.48			$ 0.35			$ 1.28	$ 1.26

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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