Securities - Summary of Securities Available-for-Sale and Restricted Stock (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2022	Dec. 31, 2021
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	$ 159,451	$ 132,392
Gross Unrealized Gains, Available-for-sale	7	793
Gross Unrealized Losses, Available-for-sale	(16,025)	(1,477)
Fair Value, Available-for-sale	143,433	131,708
Amortized Cost, Held to maturity	252,362	174,808
Gross Unrealized Gains, Held to maturity		539
Gross Unrealized Losses, Held to maturity	(37,641)	(819)
Fair Value, Held to maturity	214,721	174,528
Amortized Cost	415,428	311,867
Gross Unrealized Gains	71	1,394
Gross Unrealized Losses	(53,666)	(2,296)
Fair Value	361,833	310,965
U.S. Treasury Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	23,214	4,982
Gross Unrealized Losses, Available-for-sale	(1,033)	(10)
Fair Value, Available-for-sale	22,181	4,972
Amortized Cost, Held to maturity	12,740	12,700
Gross Unrealized Gains, Held to maturity		32
Gross Unrealized Losses, Held to maturity	(1,209)	(39)
Fair Value, Held to maturity	11,531	12,693
Mortgage-Backed Securities of Government Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	70,077	78,224
Gross Unrealized Gains, Available-for-sale	7	393
Gross Unrealized Losses, Available-for-sale	(9,575)	(843)
Fair Value, Available-for-sale	60,509	77,774
Amortized Cost, Held to maturity	237,034	159,916
Gross Unrealized Gains, Held to maturity		504
Gross Unrealized Losses, Held to maturity	(36,041)	(766)
Fair Value, Held to maturity	200,993	159,654
Asset-Backed Securities of Government Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	672	760
Gross Unrealized Losses, Available-for-sale	(16)	(7)
Fair Value, Available-for-sale	656	753
State and Political Subdivisions [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	22,725	23,189
Gross Unrealized Gains, Available-for-sale		343
Gross Unrealized Losses, Available-for-sale	(1,313)	(201)
Fair Value, Available-for-sale	21,412	23,331
Amortized Cost, Held to maturity	2,588	2,192
Gross Unrealized Gains, Held to maturity		3
Gross Unrealized Losses, Held to maturity	(391)	(14)
Fair Value, Held to maturity	2,197	2,181
Corporate Bonds [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	28,764	11,238
Gross Unrealized Gains, Available-for-sale		57
Gross Unrealized Losses, Available-for-sale	(2,680)	(89)
Fair Value, Available-for-sale	26,084	11,206
U.S. Government Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	13,999	13,999
Gross Unrealized Losses, Available-for-sale	(1,408)	(327)
Fair Value, Available-for-sale	12,591	13,672
Equity Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Equity securities	185	53
Gross Unrealized Gains, Equity securities	64	62
Fair Value, Equity securities	249	115
Restricted Stock [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost	3,430	4,614
Fair Value	$ 3,430	$ 4,614

Equity securities, FV-NI, cost with and without readily determinable value.

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Equity securities, FV-NI, unrealized gain with and without readily determinable value.

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Marketable Securities Amortized Cost

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Marketable Securities Fair Value

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Marketable Securities Unrealized Gain

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) 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, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) 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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Amortized cost of 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 investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI) and investment in equity security without readily determinable fair value.

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Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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