Investment Securities - Summary of Amortized Cost and Fair Value by Contractual Maturity (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Amortized Cost, 1 year or less	$ 8,093
Amortized Cost, Due after one year through five years	12,154
Amortized Cost, Due after five years through ten years	19,812
Amortized Cost, Due after ten years	27,845
Amortized Cost, Mortgage-backed securities and Collateralized Mortgage Obligations	50,795
Amortized Cost, Other securities	1,673
Amortized Cost	120,372	$ 86,920
Fair Value, 1 year or less	8,160
Fair Value, Due after one year through five years	12,186
Fair Value, Due after five years through ten years	19,248
Fair Value, Due after ten years	25,993
Fair Value, Mortgage-backed securities and Collateralized Mortgage Obligations	48,181
Fair Value, Other securities	1,722
Fair Value	115,490	78,813
Held to Maturity Securities Amortized Cost, 1 year or less	0
Held to Maturity Securities Amortized Cost, Due after one year through five years	6,000
Held to Maturity Securities Amortized Cost, Due after five years through ten years	9,000
Held to Maturity Securities Amortized Cost, Due after ten year	0
Mortgage-backed securities and Collateralized mortgage obligations	21,735
Held To Maturity Other securities Amortized Cost	0
Held-to-Maturity, Amortized Cost	36,735	31,822
Held to Maturity Securities Fair Value, 1 year or less	0
Held to Maturity Securities Fair Value, Due after one year through five years	5,795
Held to Maturity Securities Fair Value, Due after five years through ten years	7,613
Held to Maturity Securities Fair Value, Due after ten years	0
Mortgage-backed securities and Collateralized mortgage obligations	20,828
Held To Maturity Other securities Fair Value	0
Held-to-maturity, Fair Value	$ 34,236	$ 30,080