Allowance for Credit Losses (Narrative) (Details)	3 Months Ended
	Jun. 30, 2021	Dec. 31, 2020	Mar. 31, 2020 USD ($) risk_code	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Length of time projected by model			10 years
Days Past Due on Leases and Equipment Finance			181 days
Total troubled debt restructurings, net of deferred fees and costs | $			$ 20,500,000		$ 18,600,000
Financing receivables modified as troubled debt restructurings within the previous 12 months | $			$ 890,000	$ 0
Minimum Collateral Value compared to Secured Loan (Percent)			100.00%
Non homogeneous
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing | $			$ 90
Pass | Non homogeneous
Financing Receivable, Allowance for Credit Loss [Line Items]
Period before loans and leases are classified as substandard			30 days
Pass | Non homogeneous | Minimum [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)			1
Pass | Non homogeneous | Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)			9
Watch | Non homogeneous | Minimum [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)			10
Watch | Non homogeneous | Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)			11
Special Mention | Non homogeneous
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)			12
Special Mention | Homogeneous | Minimum [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Period before loans and leases are classified as substandard			30 days
Special Mention | Homogeneous | Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Period before loans and leases are classified as substandard			59 days
Special Mention | Homogeneous Retail | Minimum [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Period before loans and leases are classified as substandard			30 days
Special Mention | Homogeneous Retail | Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Period before loans and leases are classified as substandard			89 days
Substandard | Non homogeneous | Minimum [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)			13
Substandard | Non homogeneous | Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)			14
Substandard | Homogeneous | Minimum [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Period before loans and leases are classified as substandard			60 days
Substandard | Homogeneous | Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Period before loans and leases are classified as substandard			89 days
Substandard | Homogeneous Retail | Minimum [Member] | Open End Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Period before loans and leases are classified as substandard			90 days
Substandard | Homogeneous Retail | Minimum [Member] | Closed End Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Period before loans and leases are classified as substandard			90 days
Substandard | Homogeneous Retail | Maximum | Open End Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Period before loans and leases are classified as substandard			180 days
Substandard | Homogeneous Retail | Maximum | Closed End Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Period before loans and leases are classified as substandard			119 days
Doubtful | Non homogeneous
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)			15
Doubtful | Homogeneous | Minimum [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Period before loans and leases are classified as substandard			90 days
Doubtful | Homogeneous | Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Period before loans and leases are classified as substandard			179 days
Loss | Non homogeneous
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)			16
Loss | Non homogeneous | Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Internal risk rating code (number)			16
Loss | Homogeneous | Minimum [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Period before loans and leases are classified as substandard			180 days
Loss | Homogeneous Retail | Minimum [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Period before loans and leases are classified as substandard			120 days
Loss | Homogeneous Retail | Minimum [Member] | Closed End Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Period before loans and leases are classified as substandard			120 days
Forecast [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Real GDP Peak-to-Trough	(6.00%)	(2.00%)
Unemployment Rate	9.00%	5.00%