Securities - Schedule of Net Gains and Losses on Equity Investments Recognized in Earnings and Portion of Unrealized Gains and Losses for Period that Relates to Equity Investments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Net losses recognized on equity securities during the period	$ (141)	$ (68)
Less: Net losses realized on the sale of equity securities during the period	0	0
Unrealized losses recognized on equity securities held at reporting date	$ (141)	$ (68)