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	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Available-for-Sale Securities, Gross Unrealized Gain (Loss) [Line Items]
Gross realized gains	$ 30	$ 22	$ 168	$ 222
Gross realized losses	(1)	(2)	(12)	(41)
Net gains on debt securities	29	20	156	181
Net Unrealized gains (losses) recognized on securities still held	(627)	(35)	1,332	559
Net securities gains (losses)	$ 656	$ (15)	$ (1,176)	$ 740

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).

+ References

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-Publisher FASB
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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).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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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 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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-Publisher FASB
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Available-for-sale securities, gross unrealized gain (loss).

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