Investment Securities - Summary of Amortized Cost and Fair Value by Contractual Maturity (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Amortized Cost, 1 year or less	$ 660
Amortized Cost, Due after one year through five years	14,109
Amortized Cost, Due after five years through ten years	21,973
Amortized Cost, Due after ten years	27,529
Amortized Cost, Mortgage-backed securities and Collateralized Mortgage Obligations	88,289
Amortized Cost, Other securities	542
Amortized Cost	153,102	$ 120,372
Fair Value, 1 year or less	655
Fair Value, Due after one year through five years	13,779
Fair Value, Due after five years through ten years	20,928
Fair Value, Due after ten years	24,912
Fair Value, Mortgage-backed securities and Collateralized Mortgage Obligations	84,783
Fair Value, Other securities	533
Fair Value	145,590	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	9,250
Held to Maturity Securities Amortized Cost, Due after ten year	0
Mortgage-backed securities and Collateralized mortgage obligations	16,717
Held To Maturity Other securities Amortized Cost	0
Held-to-Maturity, Amortized Cost	31,967	36,735
Held to Maturity Securities Fair Value, 1 year or less	2,982
Held to Maturity Securities Fair Value, Due after one year through five years	2,944
Held to Maturity Securities Fair Value, Due after five years through ten years	8,340
Held to Maturity Securities Fair Value, Due after ten years	0
Mortgage-backed securities and Collateralized mortgage obligations	16,018
Held To Maturity Other securities Fair Value	0
Held-to-maturity, Fair Value	$ 30,284	$ 34,236