Loans and ACL (Summary of Loan Modification Effects) (Details)	9 Months Ended
	Sep. 30, 2023
Commercial Real Estate, Non-owner Occupied | Extended Maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable Modification Weighted Average Extension Term	3 years
Agricultural Mortgage, Portfolio Segment | Interest Rate Below Market Reduction [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	4.50%
Agricultural Mortgage, Portfolio Segment | Extended Maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable Modification Weighted Average Extension Term	1 year 29 days
Agricultural Other Portfolio Segment [Member] | Extended Maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable Modification Weighted Average Extension Term	1 year
Residential Real Estate, Senior Lien, Portfolio Segment | Extended Maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable Modification Weighted Average Extension Term	2 years 7 months 6 days