Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accounting Policies [Abstract]
Interest bearing amounts held at other financial institutions	$ 27.1	$ 54.5
Dilutive effect of common stock issuable upon exercise of options	425,337	424,109
Anti-dilutive shares	0	0