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		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Net gains (losses) recognized on equity securities during the period	$ 74	$ (170)	$ (67)	$ (238)
Less: Net gains (losses) realized on the sale of equity securities during the period	0	0	0	0
Unrealized gains (losses) recognized on equity securities held at reporting date	$ 74	$ (170)	$ (67)	$ (238)