Loans - Summary of Portfolio Loans by Category (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	$ 11,079,892	$ 10,884,118
Noncovered Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	11,081,653	10,888,345
Unearned loan fees, net	(1,761)	(4,227)
Loans and Lease Receivable, Including Unearned Loan Fees	11,079,892	10,884,118
Noncovered Loans | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	4,631,613	4,674,056
Noncovered Loans | Commercial - investor owned
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	2,526,696	2,452,402
Noncovered Loans | Commercial - owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	2,381,636	2,344,117
Noncovered Loans | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	896,768	760,122
Noncovered Loans | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	354,888	371,995
Noncovered Loans | Total real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	6,159,988	5,928,636
Noncovered Loans | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	$ 290,052	$ 285,653