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Fair Values of Financial Instruments - Additional Information (Detail) - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Transfers from Level 1 to Level 3 for financial assets	$ 0	$ 0
Transfers from Level 3 to Level 1 for financial assets	0	0
Transfers from Level 2 to Level 3 for financial assets	0	0
Transfers from Level 3 to Level 2 for financial assets	0	0
Transfers from Level 1 to Level 3 for financial liabilities	0	0
Transfers from Level 3 to Level 1 for financial liabilities	0	0
Transfers from Level 2 to Level 3 for financial liabilities	0	0
Transfers from Level 3 to Level 2 for financial liabilities	0	0
Fair value measurement of intangible assets	0	0
Loans held for sale	31,277,000	44,360,000
Loans Held For Sale [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for sale	$ 0	$ 0
Loans Held For Sale [Member] | Minimum [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Sales price of loans held for sale increase percentage	0.11%
Loans Held For Sale [Member] | Maximum [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Sales price of loans held for sale increase percentage	0.45%
Loans Held For Sale [Member] | Weighted Average [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Sales price of loans held for sale increase percentage	0.10%
Derivatives [Member] | Minimum [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Sales price of loans held for sale increase percentage	0.11%
Derivatives [Member] | Maximum [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Sales price of loans held for sale increase percentage	0.45%
Derivatives [Member] | Weighted Average [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Sales price of loans held for sale increase percentage	0.10%

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The transfer of financial assets using Level 1 fair value measurement techniques to financial assets using Level 3 fair value measurement techniques.

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The transfer of financial assets using Level 3 fair value measurement techniques to financial assets using Level 1 fair value measurement techniques.

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The transfer of financial assets using Level 3 fair value measurement techniques to financial assets using Level 2 fair value measurement techniques.

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The transfer of financial assets using Level 2 fair value measurement techniques to financial assets using Level 3 fair value measurement techniques.

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The transfer of financial liabilities using Level 1 fair value measurement techniques to financial assets using Level 3 fair value measurement techniques.

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The transfer of financial liabilities using Level 3 fair value measurement techniques to financial liabilities using Level 1 fair value measurement techniques.

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Percentage increase to investor's indicated pricing based on historical sales prices for loans held for sale and associated derivatives.

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Fair value portion of assets, excluding financial assets, that lack physical substance, having a limited useful life.

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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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