Fair Value - Summary of Quantitative Information about Level 3 Fair Value Measurements of Assets Measured on a Nonrecurring Basis (Detail) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Selling Costs [Member] \| Appraised Value Technique [Member]
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]
Collateral dependent loans	$ 1,919	$ 1,919
Valuation Technique	Discounted appraised value technique	Discounted appraised value technique
Unobservable input	Selling Costs	Selling Costs
Range	5.00%	5.00%
OREO	$ 1,338	$ 1,461
Valuation Technique	Discounted appraised value technique	Discounted appraised value technique
Unobservable Input	Selling Costs	Selling Costs
Range	7.00%	7.00%
Discount Rate [Member] \| Probability Weighted Expected Return Technique [Member]
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]
Other equity investments	$ 3,006	$ 3,006
Valuation technique	Probability weighted expected return technique	Probability weighted expected return technique
Unobservable input	Discount Rate	Discount Rate
Range	20.00%	20.00%
Discount Rate [Member] \| Valuation Technique, Discounted Cash Flow [Member]
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]
OREO	$ 222	$ 222
Valuation Technique	Discounted cash flows technique
Unobservable Input	Discount Rate
Range	20.00%
Discount Rate [Member] \| Sales Price Technique [Member]
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items]
Valuation Technique		Discounted cash flows technique
Unobservable Input		Discount Rate
Range		20.00%