Loans and Allowance for Credit Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 31,943,284	$ 29,041,605
Loan losses, allowance	346,192	300,665
Loans and Leases Receivable, Net Amount	31,597,092	28,740,940
Commercial real estate - owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,944,616	3,587,257
Commercial real estate - non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	7,447,610	6,542,619
Consumer real estate – mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,768,780	4,435,046
Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,942,143	3,679,498
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	11,307,611	10,241,362
Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 532,524	$ 555,823

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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