Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Summary Of Significant Accounting Policies [Line Items]
Interest bearing amounts held at other financial institutions	$ 89.0	$ 61.0	$ 89.0	$ 61.0
Dilutive effect of common stock issuable upon exercise of options	229,629	154,136	247,979	232,622
Anti-dilutive shares	0	266,768	0	215,902