Securities - Schedule of Gross Realized Gains and Losses on the Sales and Calls of Securities as well as Gains and Losses on Equity Securities (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Securities Gross Realized Gain Loss [Abstract]
Gross realized gains	$ 168	$ 252	$ 3,816
Gross realized losses	(21)	(57)	(1,083)
Net gains on debt securities	147	195	2,733
Unrealized (losses) gains recognized on securities still held	(1,924)	918	1,541
Net realized losses recognized on securities sold			(6)
Net (losses) gains on equity securities	(1,924)	918	1,535
Net securities (losses) gains	$ (1,777)	$ 1,113	$ 4,268

Amount of unrealized and realized gain (loss) on investment in debt and equity securities.

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Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of realized gain (loss) from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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