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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 | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Selling Costs [Member] | Appraised Value Technique [Member] |  |
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items] |  |
Collateral dependent loans | $ 3,053 | $ 6,954
Valuation Technique | Discounted appraised value technique | Discounted appraised value technique
Unobservable input | Selling Costs | Selling Costs
Range | 5.00% |
Selling Costs [Member] | Sales Price Technique [Member] |  |
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items] |  |
OREO |  | $ 279
Valuation Technique |  | Discounted sales price technique
Unobservable Input |  | Selling Costs
Range |  | 7.00%
Selling Costs [Member] | Maximum [Member] | Appraised Value Technique [Member] |  |
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items] |  |
Range |  | 15.00%
Selling Costs [Member] | Minimum [Member] | Appraised Value Technique [Member] |  |
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items] |  |
Range |  | 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] | Discounted Cash Flows Technique [Member] |  |
Disclosure Of Other Real Estate Owned Measured On Nonrecurring Vasis Valuation Techniques [Line Items] |  |
Range | 20.00% |
Collateral in nonperforming loan converted to equity | $ 222 |
Valuation technique | Discounted cash flows technique |
Unobservable Input | Discount Rate |

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