Securities - Summary of Gross Unrealized Losses and Fair Value of Available for Sale Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity, Gross Unrealized Losses, Total	$ (819)	$ (12)
Gross Unrealized Losses, Less Than 12 Months	(1,717)	(114)
Fair Value, Less Than 12 Months	177,345	14,510
Gross Unrealized Losses, 12 Months or More	(579)	(322)
Fair Value, 12 Months or More	25,103	13,544
Gross Unrealized Losses, Total	(2,296)	(436)
Fair Value, Total	202,448	28,054
U.S. Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Gross Unrealized Losses, Less Than 12 Months	(10)
Available-for-sale, Fair Value, Less Than 12 Months	4,972
Available-for-sale, Gross Unrealized Losses, Total	(10)
Available-for-sale, Fair Value, Total	4,972
Held-to-maturity, Gross Unrealized Losses, Less Than 12 Months	(39)
Held-to-maturity, Fair Value, Less Than 12 Months	9,837
Held-to-maturity, Gross Unrealized Losses, Total	(39)
Held-to-maturity, Fair Value, Total	9,837
Mortgage-Backed Securities of Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Gross Unrealized Losses, Less Than 12 Months	(574)	(70)
Available-for-sale, Fair Value, Less Than 12 Months	43,595	10,808
Available-for-sale, Gross Unrealized Losses, 12 Months or More	(269)	(66)
Available-for-sale, Fair Value, 12 Months or More	12,653	8,974
Available-for-sale, Gross Unrealized Losses, Total	(843)	(136)
Available-for-sale, Fair Value, Total	56,248	19,782
Held-to-maturity, Gross Unrealized Losses, Less Than 12 Months	(766)	(12)
Held-to-maturity, Fair Value, Less Than 12 Months	98,906	1,734
Held-to-maturity, Gross Unrealized Losses, Total	(766)	(12)
Held-to-maturity, Fair Value, Total	98,906	1,734
Asset-Backed Securities of Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Gross Unrealized Losses, 12 Months or More	(7)	(11)
Available-for-sale, Fair Value, 12 Months or More	753	837
Available-for-sale, Gross Unrealized Losses, Total	(7)	(11)
Available-for-sale, Fair Value, Total	753	837
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Gross Unrealized Losses, Less Than 12 Months	(44)	(32)
Available-for-sale, Fair Value, Less Than 12 Months	5,710	1,968
Available-for-sale, Gross Unrealized Losses, 12 Months or More	(45)	(245)
Available-for-sale, Fair Value, 12 Months or More	955	3,733
Available-for-sale, Gross Unrealized Losses, Total	(89)	(277)
Available-for-sale, Fair Value, Total	6,665	$ 5,701
U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Gross Unrealized Losses, Less Than 12 Months	(69)
Available-for-sale, Fair Value, Less Than 12 Months	2,930
Available-for-sale, Gross Unrealized Losses, 12 Months or More	(258)
Available-for-sale, Fair Value, 12 Months or More	10,742
Available-for-sale, Gross Unrealized Losses, Total	(327)
Available-for-sale, Fair Value, Total	13,672
State and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Gross Unrealized Losses, Less Than 12 Months	(201)
Available-for-sale, Fair Value, Less Than 12 Months	9,646
Available-for-sale, Gross Unrealized Losses, Total	(201)
Available-for-sale, Fair Value, Total	9,646
Held-to-maturity, Gross Unrealized Losses, Less Than 12 Months	(14)
Held-to-maturity, Fair Value, Less Than 12 Months	1,749
Held-to-maturity, Gross Unrealized Losses, Total	(14)
Held-to-maturity, Fair Value, Total	$ 1,749

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