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Fair Value - Fair Value Measurement (Detail) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Assumed Gain From Loan Sale $ 10,092    
Interest Rate Movement Effect (48,594)    
Servicing Rights Value 37,152    
Security Price Change 2,157    
Total Fair Value Measurement 807   $ 18,237
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 2,670,889    
Assumed Gain From Loan Sale 8,756    
Interest Rate Movement Effect (30,908)    
Servicing Rights Value 32,579    
Total Fair Value Measurement 10,427    
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 2,766,048    
Security Price Change 2,157    
Total Fair Value Measurement 2,157    
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 1,336    
Interest Rate Movement Effect (17,686)    
Servicing Rights Value 4,573    
Fair value, option, changes in fair value, gain (loss) (11,777) $ 4,296  
Fair Value, principal amount, loans held for sale $ 347,401 $ 297,896