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Fair Value Measurements and Disclosures - Summary of Quantitative Information Using Level 3 Fair Value Measurements (Detail) - Fair Value, Inputs, Level 3 [Member] $ in Thousands | Sep. 30, 2025 USD ($) | Dec. 31, 2024 USD ($)
--- | --- | ---
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans Receivable, Fair Value Disclosure | $ 1,799,516 | $ 1,798,302
Measurement Input Discount Rate Adjustment [Member] | Collateral dependent loan [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans Receivable Measurement Input |  | 0.12
Measurement Input Discount Rate Adjustment [Member] | Other Real Estate Owned [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans Receivable Measurement Input |  | 0
Measurement Input Discount Rate Adjustment [Member] | Valuation Technique Collateral [Member] | Weighted Average [Member] | Collateral dependent loan [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans Receivable, Fair Value Disclosure |  | $ 16,223
Loans Receivable Measurement Input |  | 0.12
Measurement Input Discount Rate Adjustment [Member] | Valuation Technique Collateral [Member] | Weighted Average [Member] | Other Real Estate Owned [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Loans Receivable, Fair Value Disclosure |  | $ 295
Loans Receivable Measurement Input |  | 0

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