Investment Securities - Summary of Amortized Cost and Fair Value by Contractual Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Amortized Cost, 1 year or less	$ 377
Amortized Cost, Due after one year through five years	5,423
Amortized Cost, Due after five years through ten years	11,991
Amortized Cost, Due after ten years	28,056
Amortized Cost, Mortgage-backed securities and Collateralized Mortgage Obligations	50,283
Amortized Cost	96,130	$ 101,453
Fair Value, 1 year or less	377
Fair Value, Due after one year through five years	5,429
Fair Value, Due after five years through ten years	11,814
Fair Value, Due after ten years	27,275
Fair Value, Mortgage-backed securities, residential	48,307
Fair Value	93,202	103,783
Held to Maturity Securities Amortized Cost, Due after five years through ten years	5,000
Held-to-Maturity, Amortized Cost	5,000
Held to Maturity Securities Fair Value, Due after five years through ten years	4,981
Held-to-maturity, Fair Value	$ 4,981	$ 0