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Fair Value - Additional Information (Detail)
$ in Thousands
6 Months Ended
Jun. 30, 2023
USD ($)
$ / shares
Dec. 31, 2022
USD ($)
Servicing Assets At Fair Value [Line Items]    
Servicing rights of sold loans $ 2,150,000 $ 2,160,000
Weighted average net servicing fee income, Basis points 0.283%  
Weighted average prepayment speed assumption used in the fair value 8.06%  
Weighted average discount rate 9.92%  
Minimum [Member]    
Servicing Assets At Fair Value [Line Items]    
Estimated base annual servicing costs | $ / shares 75.00  
Base discount rate 9.50%  
Maximum [Member]    
Servicing Assets At Fair Value [Line Items]    
Estimated base annual servicing costs | $ / shares 85.00  
Base discount rate 11.50%  
11 Corporate Bonds | Level 3 [Member]    
Servicing Assets At Fair Value [Line Items]    
Purchase price $ 8,300  
Six Mortgage Backed Securities | Level 3 [Member]    
Servicing Assets At Fair Value [Line Items]    
Purchase price 7,400  
Corporate Bonds [Member] | Level 3 [Member] | Fair Value, Recurring [Member]    
Servicing Assets At Fair Value [Line Items]    
Transfres from level 2 to level 3 $ 4,000