Segment Reporting (Details Textuals) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Risk Management and Shared Services [Member]
Segment Reporting Information [Line Items]
A portion of total depreciation Equipment expense	$ 5.9	$ 7.9
Corporate and Commercial Specialty [Member]
Segment Reporting Information [Line Items]
A portion of total depreciation Technology expense	0.1	0.1
Community, Consumer and Business [Member]
Segment Reporting Information [Line Items]
A portion of total depreciation Occupancy expense	$ 6.2	$ 5.9