Securities - Summary of Securities Available-for-Sale and Restricted Stock (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	$ 132,392	$ 189,072
Gross Unrealized Gains, Available-for-sale	793	1,790
Gross Unrealized Losses, Available-for-sale	(1,477)	(424)
Fair Value, Available-for-sale	131,708	190,438
Amortized Cost, Held-to-maturity	174,808	9,045
Gross Unrealized Gains, Held-to-maturity	539	192
Gross Unrealized Losses, Held-to-maturity	(819)	(12)
Fair Value, Held-to-maturity	174,528	9,225
Amortized Cost	311,867	202,784
Gross Unrealized Gains	1,394	2,016
Gross Unrealized Losses	(2,296)	(436)
Fair Value	310,965	204,364
U.S. Treasury Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	4,982	999
Gross Unrealized Gains, Available-for-sale		12
Gross Unrealized Losses, Available-for-sale	(10)
Fair Value, Available-for-sale	4,972	1,011
Amortized Cost, Held-to-maturity	12,700
Gross Unrealized Gains, Held-to-maturity	32
Gross Unrealized Losses, Held-to-maturity	(39)
Fair Value, Held-to-maturity	12,693
U.S. Government Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	13,999	13,998
Gross Unrealized Gains, Available-for-sale		8
Gross Unrealized Losses, Available-for-sale	(327)
Fair Value, Available-for-sale	13,672	14,006
Mortgage-Backed Securities of Government Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	78,224	138,964
Gross Unrealized Gains, Available-for-sale	393	1,184
Gross Unrealized Losses, Available-for-sale	(843)	(136)
Fair Value, Available-for-sale	77,774	140,012
Amortized Cost, Held-to-maturity	159,916	5,620
Gross Unrealized Gains, Held-to-maturity	504	192
Gross Unrealized Losses, Held-to-maturity	(766)	(12)
Fair Value, Held-to-maturity	159,654	5,800
Asset-Backed Securities of Government Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	760	848
Gross Unrealized Losses, Available-for-sale	(7)	(11)
Fair Value, Available-for-sale	753	837
State and Political Subdivisions [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	23,189	23,422
Gross Unrealized Gains, Available-for-sale	343	544
Gross Unrealized Losses, Available-for-sale	(201)
Fair Value, Available-for-sale	23,331	23,966
Amortized Cost, Held-to-maturity	2,192	3,425
Gross Unrealized Gains, Held-to-maturity	3
Gross Unrealized Losses, Held-to-maturity	(14)
Fair Value, Held-to-maturity	2,181	3,425
Corporate Bonds [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	11,238	10,841
Gross Unrealized Gains, Available-for-sale	57	42
Gross Unrealized Losses, Available-for-sale	(89)	(277)
Fair Value, Available-for-sale	11,206	10,606
Equity Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Equity securities	53	53
Gross Unrealized Gains, Equity securities	62	34
Fair Value, Equity securities	115	87
Restricted Stock [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost	4,614	4,614
Fair Value	$ 4,614	$ 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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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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