Securities - Summary of Amortized Cost and Fair Value of Debt Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Available-for-sale
Due in one year or less, Amortized Cost	$ 23,163
Due after one through five years, Amortized Cost	21,113
Due after five through ten years, Amortized Cost	16,601
Due after ten years, Amortized Cost	66,288
Amortized Cost, Available-for-sale	127,165	$ 134,736
Due in one year or less, Fair Value	22,983
Due after one through five years, Fair Value	20,474
Due after five through ten years, Fair Value	15,423
Due after ten years, Fair Value	60,548
Total debt securities available-for-sale, Fair Value	119,428	125,434
Held-to-maturity
Due in one year or less, Amortized Cost	2,489
Due after one through five years, Amortized cost	3,305
Due after five through ten years, Amortized Cost	4,693
Due after ten years, Amortized Cost	189,513
Amortized Cost, Held to maturity	200,000	204,309
Due in one year or less, Fair Value	2,444
Due after one through five years, Fair Value	3,120
Due after five through ten years, Fair Value	4,202
Due after ten years, Fair Value	162,712
Total debt securities held-to-maturity, Fair Value	$ 172,478	$ 172,603