Loans Held for Sale - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities
Loans Held for Sale (Table)	$ 0.9	$ 47.4
Amortization of unrealized gains and losses on transfers of securities	0.0	30.4	$ 12.4
Transfer of Loans Held-for-sale to Portfolio Loans	0.0	(29.6)	(19.8)
Transfer of loans to other real estate owned	4.6	8.3	$ 0.4
Non-accrual Loans		27.3
Financing Receivables, Equal to Greater than 90 Days Past Due
Schedule of Available-for-sale Securities
Non-accrual Loans	40.5	44.2
Agricultural Financing Receivable [Member]
Schedule of Available-for-sale Securities
Loans Held for Sale (Table)	0.0	19.6
Proceeds from Collection of Loans Held-for-sale	(19.6)
Proceeds from Sale of Loans Held-for-sale	0.0
Commercial Real Estate
Schedule of Available-for-sale Securities
Loans Held for Sale (Table)	0.0	27.3
Proceeds from Collection of Loans Held-for-sale	0.0
Proceeds from Sale of Loans Held-for-sale	(27.3)
Commercial Portfolio Segment [Member]
Schedule of Available-for-sale Securities
Non-accrual Loans	33.5	11.5
Agricultural Financing Receivable [Member]
Schedule of Available-for-sale Securities
Non-accrual Loans	20.9	30.4
Agricultural Financing Receivable [Member]
Schedule of Available-for-sale Securities
Loans Held for Sale (Table)	0.0	19.6
Residential Real Estate
Schedule of Available-for-sale Securities
Loans Held for Sale (Table)	0.9	0.5
Commercial Real Estate
Schedule of Available-for-sale Securities
Loans Held for Sale (Table)	$ 0.0	$ 27.3