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Qualified Affordable Housing Project and Historic Tax Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Equity Method Investments and Joint Ventures [Abstract]
Investments in qualified affordable housing projects	$ 23.2	$ 18.0
Investment, proportional amortization method, elected statement of financial position [extensible enumeration]	Other assets	Other assets
Investments in qualified affordable housing projects, unfunded commitments	$ 7.6	$ 0.7
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization Expense	5.4	5.6	$ 6.1
Amortization expense that qualified for proportional amortization method	$ 2.9	$ 3.1	$ 3.6
Investment program, proportional amortization method, elected, income tax credit and other income tax benefit, before amortization, statement of income or comprehensive income [Extensible Enumeration]	Income tax expense	Income tax expense	Income tax expense
Investment program, proportional amortization method, applied, amortization expense, statement of income or comprehensive income [extensible enumeration]			Income tax expense
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, after Amortization, Statement of Cash Flows [Extensible Enumeration]			income tax expense
Investment Program Proportional Amortization Method Elected Income Tax Credit And Other Income Tax Benefit Before Amortization Statement Of Cash Flows Extensible Enumeration Not Disclosed Flag	Consolidated Statements of Income	Consolidated Statements of Income	Consolidated Statements of Income
Investment Program Proportional Amortization Method Applied Income Tax Credit And Other Tax Benefit Amortization Statement Of Cash Flows Extensible Enumeration Not Disclosed Flag	Consolidated Statements of Income	Consolidated Statements of Income	Consolidated Statements of Income
Investment program, proportional amortization method, elected, income tax credit and other income tax benefit, after amortization, statement of income or comprehensive income [Extensible Enumeration]	Net Income (Loss)	Net Income (Loss)	Net Income (Loss)
Investments in qualified affordable housing projects, amortization expense	$ 2.5	$ 2.5	$ 2.5
Investment program, proportional amortization method, applied, non-income-tax-related activity and other return, statement of income or comprehensive income [Extensible Enumeration]	Other operating	Other operating	Other operating

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