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Fair Value Measurements - Additional Information (Detail) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Days from origination after which mortgage loans are sold 30 days  
Amount of non-financial assets (liabilities) measured at fair value on a recurring basis $ 0 $ 0
Non-financial assets for which no impairment was provided $ 0 $ 0