Loans and Allowance for Credit Losses - Financial Impact of Modifications (Details)	12 Months Ended
Dec. 31, 2023
Commercial Loans \| Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in Months)	4 months
Weighted-Average Interest Rate Reduction	0.00%
Commercial Loans \| Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in Months)	5 months
Weighted-Average Interest Rate Reduction	0.00%
Commercial Loans \| Commercial construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in Months)	0 months
Weighted-Average Interest Rate Reduction	0.00%
Business banking
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in Months)	19 months
Weighted-Average Interest Rate Reduction	0.00%
Consumer Loans \| Consumer real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in Months)	168 months
Weighted-Average Interest Rate Reduction	2.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Percentage of decrease in weighted average contractual interest rate of financing receivable modified for debtor experiencing financial difficulty.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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-SubTopic 10
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