Loans and Allowance for Credit Losses for Loans - Summary of Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 48,799,711	$ 50,210,295
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	9,931,400	9,230,543
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	29,644,958	31,970,047
Commercial real estate | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	26,530,225	28,243,239
Commercial real estate | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,114,733	3,726,808
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,632,516	5,569,010
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,590,837	3,440,695
Consumer | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	604,433	559,152
Collateral Pledged
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	329,702	264,678
Collateral Pledged | Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	131,898	96,827
Collateral Pledged | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	172,666	145,419
Collateral Pledged | Commercial real estate | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	156,825	98,785
Collateral Pledged | Commercial real estate | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	15,841	46,634
Collateral Pledged | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	23,797	21,843
Collateral Pledged | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	589
Collateral Pledged | Consumer | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 1,341	$ 0