Loans - Summary of Portfolio Loans by Category (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	$ 10,011,918	$ 9,737,138
Portfolio loans, net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	10,018,815	9,744,427
Unearned loan fees, net	(6,897)	(7,289)
Loans and Lease Receivable, Including Unearned Loan Fees	10,011,918	9,737,138
Portfolio loans, net | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	4,032,189	3,859,964
Portfolio loans, net | Commercial - investor owned
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	2,418,079	2,357,820
Portfolio loans, net | Commercial - owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	2,281,223	2,270,551
Portfolio loans, net | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	663,264	611,565
Portfolio loans, net | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	364,059	395,537
Portfolio loans, net | Total real estate loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	5,726,625	5,635,473
Portfolio loans, net | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, before unearned loan fees	$ 260,001	$ 248,990