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Fair Value - Fair Value Measurement (Detail) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Assumed Gain From Loan Sale $ 10,686    
Interest Rate Movement Effect (29,700)    
Servicing Rights Value 40,949    
Security Price Change 13,119    
Total Fair Value Measurement 35,054   $ (7,435)
Mortgage Banking | Level 2 | Fair Value, Recurring | Rate Lock Commitments      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair value disclosure, off-balance sheet risks, face amount, liability 2,618,808    
Assumed Gain From Loan Sale 8,932    
Interest Rate Movement Effect (23,985)    
Servicing Rights Value 34,502    
Total Fair Value Measurement 19,449    
Mortgage Banking | Level 2 | Fair Value, Recurring | Forward Sales Contracts      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair value disclosure, off-balance sheet risks, face amount, liability 2,780,429    
Security Price Change 13,119    
Total Fair Value Measurement 13,119    
Mortgage Banking | Level 2 | Fair Value, Recurring | Mortgages Held for Sale      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Assumed Gain From Loan Sale 1,754    
Interest Rate Movement Effect (5,715)    
Servicing Rights Value 6,447    
Fair value, option, changes in fair value, gain (loss) 2,486 $ 2,675  
Fair Value, principal amount, loans held for sale $ 436,270 $ 319,481