Loans and Allowance for Credit Losses - Financial Impact of Modifications (Details)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Commercial loans | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)	10 months
Weighted-Average Term Extension and Payment Delays (in months)	3 months	13 months
Commercial loans | Commercial construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension and Payment Delays (in months)		13 months
Commercial loans | Consumer real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension and Payment Delays (in months)		15 months
Business banking | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)	12 months
Consumer loans | Consumer real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)	346 months	122 months