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Loans and Allowance for Credit Losses - Narrative (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2023
USD ($)
Dec. 31, 2022
USD ($)
Loans and Leases Receivable Disclosure [Line Items]    
Deferred commitment fee $ 27,400 $ 29,200
Servicing asset at fair value 315,900 361,500
Loans, net 7,833,059 $ 7,561,188
ADC Loans    
Loans and Leases Receivable Disclosure [Line Items]    
Loans, net $ 1,500,000  
Percent of ADC loan portfolio using interest reserves 52.40%  
Income Producing Commercial Real Estate and Real Estate Construction    
Loans and Leases Receivable Disclosure [Line Items]    
Stress test assumption increase interest rates 2.00%  
Minimum | Income Producing Commercial Real Estate and Real Estate Construction    
Loans and Leases Receivable Disclosure [Line Items]    
Minimum cash flow debt service coverage ratio 1.15  
Minimum | Commercial    
Loans and Leases Receivable Disclosure [Line Items]    
Loan period, preferred term 5 years  
Maximum | Real estate mortgage - residential | Land Acquisition Development and Construction Loans    
Loans and Leases Receivable Disclosure [Line Items]    
Loan period 36 months  
Maximum | Construction - commercial and residential | Land Acquisition Development and Construction Loans    
Loans and Leases Receivable Disclosure [Line Items]    
Loan period 24 months  
Maximum | Income Producing Commercial Real Estate and Real Estate Construction    
Loans and Leases Receivable Disclosure [Line Items]    
Minimum cash flow debt service coverage ratio 1.0  
Maximum | Commercial    
Loans and Leases Receivable Disclosure [Line Items]    
Loan period 10 years  
Loan period, preferred term 7 years  
Amortization term 25 years