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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Acquired Finite-Lived Intangible Assets [Line Items]          
Goodwill $ 125,520,000   $ 125,520,000   $ 125,520,000
Amortization of core deposit intangible assets 318,000 $ 363,000 988,000 $ 1,120,000  
Valuation allowance $ 0 $ 0 $ 0 $ 0