Securities - Summary of Amortized Cost and Fair Value of Debt Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Available-for-sale
Due in one year or less, Amortized Cost	$ 7,956
Due after one through five years, Amortized Cost	62,410
Due after five through ten years, Amortized Cost	24,650
Due after ten years, Amortized Cost	67,562
Amortized Cost, Available-for-sale	162,578	$ 164,705
Due in one year or less, Fair Value	7,798
Due after one through five years, Fair Value	58,490
Due after five through ten years, Fair Value	22,777
Due after ten years, Fair Value	60,204
Total debt securities available-for-sale, Fair Value	149,269	150,069
Held-to-maturity
Due in one year or less, Amortized Cost	2,498
Due after one through five years, Amortized cost	7,419
Due after five through ten years, Amortized Cost	4,748
Due after ten years, Amortized Cost	228,669
Amortized Cost, Held to maturity	243,334	247,401
Due in one year or less, Fair Value	2,446
Due after one through five years, Fair Value	6,907
Due after five through ten years, Fair Value	4,260
Due after ten years, Fair Value	199,438
Total debt securities held-to-maturity, Fair Value	$ 213,051	$ 211,954