Investment Securities - Summary of Amortized Cost and Fair Value by Contractual Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Amortized Cost, 1 year or less	$ 657
Amortized Cost, Due after one year through five years	15,020
Amortized Cost, Due after five years through ten years	22,407
Amortized Cost, Due after ten years	26,234
Amortized Cost, Mortgage-backed securities and Collateralized Mortgage Obligations	99,909
Amortized Cost, Other securities	408
Amortized Cost	164,635	$ 153,102
Fair Value, 1 year or less	654
Fair Value, Due after one year through five years	14,801
Fair Value, Due after five years through ten years	21,422
Fair Value, Due after ten years	23,861
Fair Value, Mortgage-backed securities and Collateralized Mortgage Obligations	98,045
Fair Value, Other securities	400
Fair Value	159,183	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	15,833
Held To Maturity Other securities Amortized Cost	0
Held-to-Maturity, Amortized Cost	28,083	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	2,962
Held to Maturity Securities Fair Value, Due after five years through ten years	8,460
Held to Maturity Securities Fair Value, Due after ten years	0
Mortgage-backed securities and Collateralized mortgage obligations	15,342
Held To Maturity Other securities Fair Value	0
Held-to-maturity, Fair Value	$ 26,764	$ 30,284