Securities Available-for-Sale - Summary of gross unrealized losses and fair value for those investments with unrealized losses (Detail) $ in Thousands	Mar. 31, 2022 USD ($) Number	Dec. 31, 2021 USD ($) Number
Less than 12 Months, Number of Securities | Number	108	43
Less than 12 Months, Fair Value	$ 78,580	$ 36,824
Less than 12 Months, Unrealized Losses	$ (5,329)	$ (633)
More than 12 Months, Number of Securities | Number	11	4
More than 12 Months, Fair Value	$ 9,081	$ 3,837
More than 12 Months, Unrealized Losses	(1,002)	(135)
Total, Fair Value	87,661	40,661
Total, Unrealized Losses	$ (6,331)	$ (768)
U.S. Government-sponsored enterprises obligations [Member]
Less than 12 Months, Number of Securities | Number	7	7
Less than 12 Months, Fair Value	$ 4,301	$ 5,022
Less than 12 Months, Unrealized Losses	$ (290)	$ (80)
More than 12 Months, Number of Securities | Number	3	2
More than 12 Months, Fair Value	$ 1,786	$ 949
More than 12 Months, Unrealized Losses	(196)	(47)
Total, Fair Value	6,087	5,971
Total, Unrealized Losses	$ (486)	$ (127)
U.S. Government agency small business administration pools guaranteed by SBA [Member]
Less than 12 Months, Number of Securities | Number	7	3
Less than 12 Months, Fair Value	$ 6,264	$ 2,988
Less than 12 Months, Unrealized Losses	(321)	(36)
Total, Fair Value	6,264	2,988
Total, Unrealized Losses	$ (321)	$ (36)
Collateralized mortgage obligations issued by the FHLMC, FNMA and GNMA [Member]
Less than 12 Months, Number of Securities | Number	5	4
Less than 12 Months, Fair Value	$ 3,606	$ 2,779
Less than 12 Months, Unrealized Losses	$ (253)	(69)
More than 12 Months, Number of Securities | Number	1
More than 12 Months, Fair Value	$ 287
More than 12 Months, Unrealized Losses	(27)
Total, Fair Value	3,893	2,779
Total, Unrealized Losses	$ (280)	$ (69)
Residential mortgage backed securities [Member]
Less than 12 Months, Number of Securities | Number	23	22
Less than 12 Months, Fair Value	$ 17,150	$ 19,541
Less than 12 Months, Unrealized Losses	$ (1,426)	$ (399)
More than 12 Months, Number of Securities | Number	6	1
More than 12 Months, Fair Value	$ 6,470	$ 2,304
More than 12 Months, Unrealized Losses	(733)	(85)
Total, Fair Value	23,620	21,845
Total, Unrealized Losses	$ (2,159)	$ (484)
Municipal bonds [Member]
Less than 12 Months, Number of Securities | Number	63	7
Less than 12 Months, Fair Value	$ 43,337	$ 6,494
Less than 12 Months, Unrealized Losses	$ (2,895)	$ (49)
More than 12 Months, Number of Securities | Number	1	1
More than 12 Months, Fair Value	$ 538	$ 584
More than 12 Months, Unrealized Losses	(46)	(3)
Total, Fair Value	43,875	7,078
Total, Unrealized Losses	$ (2,941)	$ (52)
Corporate subordinated debt [Member]
Less than 12 Months, Number of Securities | Number	3
Less than 12 Months, Fair Value	$ 3,922
Less than 12 Months, Unrealized Losses	(144)
Total, Fair Value	3,922
Total, Unrealized Losses	$ (144)