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Loans and Allowance for Credit Losses (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans $ 27,711,694 $ 23,414,262
Loan losses, allowance 288,088 263,233
Loans and Leases Receivable, Net Amount 27,423,606 23,151,029
Commercial real estate - Owner occupied    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 3,426,271 3,048,822
Commercial real estate - Non-owner occupied    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 6,164,981 5,221,704
Consumer real estate – mortgage    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 4,271,913 3,680,684
Construction and land development    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 3,548,970 2,903,017
Commercial and industrial    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans 9,748,994 8,074,546
Consumer and other    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans $ 550,565 $ 485,489