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Investments in Qualified Affordable Housing Projects (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Investments in Qualified Affordable Housing Projects    
Tax credits and other tax benefits $ 15.5 $ 16.4
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 (Benefit) Income Tax Expense (Benefit)
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 true true
Amortization $ 14.4 $ 9.6
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration] Income Tax Expense (Benefit) Noninterest Expense
Investment Program Proportional Amortization Method Applied Income Tax Credit And Other Tax Benefit Amortization Statement Of Cash Flows Extensible Enumeration Not Disclosed Flag true true
Carrying value $ 78.0 $ 101.8
Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration] Other Assets. Other Assets.
Funding obligation $ 9.8 $ 12.5
Percentage of remaining funding obligation expected to be funded 88.00%