Allowance for Credit Losses (Accrued Interest Reversed Through Income) (Details) $ in Millions	Mar. 31, 2020 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable accrued interest income	$ 1.3
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable accrued interest income	0.5
Personal
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable accrued interest income	$ 0.8