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Fair Value - Additional Information (Detail)
$ in Thousands
3 Months Ended 12 Months Ended
Jun. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
$ / shares
Dec. 31, 2023
USD ($)
Servicing Assets At Fair Value [Line Items]      
Servicing rights of sold loans   $ 33,900 $ 2,100,000
Sale of mortgage servicing rights $ 1,940,000    
Weighted average net servicing fee income, Basis points   0.25%  
Weighted average prepayment speed assumption used in the fair value   9.58%  
Weighted average discount rate   9.00%  
Impairment charge $ 8,500 $ 8,500  
Minimum [Member]      
Servicing Assets At Fair Value [Line Items]      
Estimated base annual servicing costs | $ / shares   70  
Weighted average discount rate   9.00%  
Maximum [Member]      
Servicing Assets At Fair Value [Line Items]      
Estimated base annual servicing costs | $ / shares   85  
Weighted average discount rate   11.00%  
Two Corporate Bond [Member] | Level 3 [Member]      
Servicing Assets At Fair Value [Line Items]      
Amortized cost basis   $ 750 $ 750