Investment Securities - Summary of Amortized Cost and Fair Value by Contractual Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Amortized Cost, 1 year or less	$ 7,119
Amortized Cost, Due after one year through five years	13,202
Amortized Cost, Due after five years through ten years	18,830
Amortized Cost, Due after ten years	26,911
Amortized Cost, Mortgage-backed securities and Collateralized Mortgage Obligations	80,363
Amortized Cost, Other securities	550
Amortized Cost	146,975	$ 120,372
Fair Value, 1 year or less	7,106
Fair Value, Due after one year through five years	12,915
Fair Value, Due after five years through ten years	17,751
Fair Value, Due after ten years	24,577
Fair Value, Mortgage-backed securities and Collateralized Mortgage Obligations	77,233
Fair Value, Other securities	539
Fair Value	140,121	115,490
Held to Maturity Securities Amortized Cost, 1 year or less	3,000
Held to Maturity Securities Amortized Cost, Due after one year through five years	3,000
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	20,845
Held To Maturity Other securities Amortized Cost	0
Held-to-Maturity, Amortized Cost	35,845	36,735
Held to Maturity Securities Fair Value, 1 year or less	2,959
Held to Maturity Securities Fair Value, Due after one year through five years	2,885
Held to Maturity Securities Fair Value, Due after five years through ten years	7,362
Held to Maturity Securities Fair Value, Due after ten years	0
Mortgage-backed securities and Collateralized mortgage obligations	20,002
Held To Maturity Other securities Fair Value	0
Held-to-maturity, Fair Value	$ 33,208	$ 34,236