Minimum Regulatory Capital Requirements - Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Banking regulation capital transitional amount				$ 5.5
Banking regulation capital transitional amount substracted				$ 1.4
CECL Adjustment to Regulatory Capital [Member] | Forecast [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Adjustment to regulatory capital	25.00%	50.00%	25.00%
Common Equity Tier 1 Capital [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Capital conservation buffer				2.50%