Securities Available-for-Sale - Summary of gross unrealized losses and fair value for those investments with unrealized losses (Detail) $ in Thousands	Jun. 30, 2023 USD ($) Number	Dec. 31, 2022 USD ($) Number
Less than 12 Months, Number of Securities \| Number	30	113
Less than 12 Months, Fair Value	$ 20,651	$ 68,033
Less than 12 Months, Unrealized Losses	$ (899)	$ (7,853)
More than 12 Months, Number of Securities \| Number	129	41
More than 12 Months, Fair Value	$ 78,671	$ 28,219
More than 12 Months, Unrealized Losses	(12,908)	(6,628)
Total, Fair Value	99,322	96,252
Total, Unrealized Losses	$ (13,807)	$ (14,481)
U.S. Government-sponsored enterprises obligations [Member]
Less than 12 Months, Number of Securities \| Number		1
Less than 12 Months, Fair Value		$ 453
Less than 12 Months, Unrealized Losses		$ (43)
More than 12 Months, Number of Securities \| Number	4	3
More than 12 Months, Fair Value	$ 1,840	$ 1,373
More than 12 Months, Unrealized Losses	(338)	(322)
Total, Fair Value	1,840	1,826
Total, Unrealized Losses	$ (338)	$ (365)
U.S. Government agency small business administration pools guaranteed by SBA [Member]
Less than 12 Months, Number of Securities \| Number	4	8
Less than 12 Months, Fair Value	$ 2,667	$ 5,947
Less than 12 Months, Unrealized Losses	$ (213)	$ (602)
More than 12 Months, Number of Securities \| Number	7	3
More than 12 Months, Fair Value	$ 5,121	$ 2,412
More than 12 Months, Unrealized Losses	(964)	(514)
Total, Fair Value	7,788	8,359
Total, Unrealized Losses	$ (1,177)	$ (1,116)
Collateralized mortgage obligations issued by the FHLMC, FNMA and GNMA [Member]
Less than 12 Months, Number of Securities \| Number	5	5
Less than 12 Months, Fair Value	$ 3,584	$ 3,212
Less than 12 Months, Unrealized Losses	$ (240)	$ (209)
More than 12 Months, Number of Securities \| Number	5	4
More than 12 Months, Fair Value	$ 2,280	$ 2,016
More than 12 Months, Unrealized Losses	(490)	(499)
Total, Fair Value	5,864	5,228
Total, Unrealized Losses	$ (730)	$ (708)
Residential mortgage backed securities [Member]
Less than 12 Months, Number of Securities \| Number	3	8
Less than 12 Months, Fair Value	$ 2,530	$ 4,239
Less than 12 Months, Unrealized Losses	$ (100)	$ (503)
More than 12 Months, Number of Securities \| Number	30	23
More than 12 Months, Fair Value	$ 19,142	$ 16,649
More than 12 Months, Unrealized Losses	(4,372)	(4,064)
Total, Fair Value	21,672	20,888
Total, Unrealized Losses	$ (4,472)	$ (4,567)
Municipal bonds [Member]
Less than 12 Months, Number of Securities \| Number	13	86
Less than 12 Months, Fair Value	$ 7,370	$ 49,228
Less than 12 Months, Unrealized Losses	$ (164)	$ (5,900)
More than 12 Months, Number of Securities \| Number	80	8
More than 12 Months, Fair Value	$ 47,197	$ 5,769
More than 12 Months, Unrealized Losses	(5,794)	(1,229)
Total, Fair Value	54,567	54,997
Total, Unrealized Losses	$ (5,958)	$ (7,129)
Corporate debt [Member]
Less than 12 Months, Number of Securities \| Number	1	1
Less than 12 Months, Fair Value	$ 485	$ 497
Less than 12 Months, Unrealized Losses	(15)	(3)
Total, Fair Value	485	497
Total, Unrealized Losses	$ (15)	$ (3)
Corporate subordinated debt [Member]
Less than 12 Months, Number of Securities \| Number	4	4
Less than 12 Months, Fair Value	$ 4,015	$ 4,457
Less than 12 Months, Unrealized Losses	$ (167)	(593)
More than 12 Months, Number of Securities \| Number	3
More than 12 Months, Fair Value	$ 3,091
More than 12 Months, Unrealized Losses	(950)
Total, Fair Value	7,106	4,457
Total, Unrealized Losses	$ (1,117)	$ (593)

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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