Investment Securities - Summary of Amortized Cost and Fair Value by Contractual Maturity (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Amortized Cost, Due within one year	$ 222
Amortized Cost, Due after one year through five years	16,430
Amortized Cost, Due after five years through ten years	22,142
Amortized Cost, Due after ten years	25,141
Amortized Cost, Mortgage-backed securities and Collateralized Mortgage Obligations	111,564
Amortized Cost, Other securities	358
Amortized Cost	175,857	$ 153,102
Fair Value, Due within one year	222
Fair Value, Due after one year through five years	16,161
Fair Value, Due after five years through ten years	21,327
Fair Value, Due after ten years	21,954
Fair Value, Mortgage-backed securities and Collateralized Mortgage Obligations	109,554
Fair Value, Other securities	351
Fair Value	169,569	145,590
Held to Maturity Securities Amortized Cost, 1 year or less	0
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	15,034
Held To Maturity Other securities Amortized Cost	0
Held-to-Maturity, Amortized Cost	27,284	31,967
Held to Maturity Securities Fair Value, 1 year or less	0
Held to Maturity Securities Fair Value, Due after one year through five years	2,970
Held to Maturity Securities Fair Value, Due after five years through ten years	8,552
Held to Maturity Securities Fair Value, Due after ten years	0
Mortgage-backed securities and Collateralized mortgage obligations	14,582
Held To Maturity Other securities Fair Value	0
Held-to-maturity, Fair Value	$ 26,104	$ 30,284