Loans - Summary of Portfolio Loans by Category (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	$ 11,692,780	$ 11,800,338
Noncovered Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	11,693,751	11,801,093
Unearned loan fees, net	(971)	(755)
Loans and Lease Receivable, Including Unearned Loan Fees	11,692,780	11,800,338
Noncovered Loans | C&I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	5,172,817	5,236,473
Noncovered Loans | Commercial - investor owned
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	2,960,830	2,986,906
Noncovered Loans | Commercial - owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	2,487,565	2,460,761
Noncovered Loans | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	669,921	689,357
Noncovered Loans | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	345,568	367,127
Noncovered Loans | Total real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	6,463,884	6,504,151
Noncovered Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	$ 57,050	$ 60,469