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Loans and Allowance for Credit Losses - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Loans $ 34,308,310   $ 34,308,310   $ 32,676,091
Percentage of loan portfolio as commercial loan 80.00%   80.00%    
Risk rated loans $ 1,500   $ 1,500    
Percentage of credit exposure to risk based capital 25.00%   25.00%    
Loans and other extensions of credit granted to directors, executive officers, and their related entities $ 41,300   $ 41,300   37,700
Amount drawn from loans and other extensions of credit granted 39,300   39,300   34,700
Commercial loans held-for-sale 8,617   8,617   9,280
Mortgage loans held-for-sale 33,300   33,300   20,200
Loans sold     574,800 $ 511,300  
Gain (Loss) on Sale of Mortgage Loans 2,600 $ 2,000 8,792 $ 5,632  
Consumer loans held-for-sale, excluding mortgage loans $ 145,300   $ 145,300   $ 84,000
Construction and land development          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Percentage of credit exposure to risk based capital 68.20%   68.20%   84.20%
Non-owner occupied commercial real estate and multifamily loans          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Percentage of credit exposure to risk based capital 243.30%   243.30%   259.00%