Leases (Finance Lease Receivables By Risk Categories) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment [Line Items]
Net investment in finance leases, 2020	$ 17,072
Net investment in finance leases, 2019	81,376
Net investment in finance leases, 2018	249,025
Net investment in finance leases, 2017	168,958
Net investment in finance leases, 2016	7,802
Net investment in finance leases, Prior	6,217
Total net investment in finance leases	530,450	$ 567,368
Financing receivable, 2020	29,103
Financing receivable, 2019	31,661
Total financing receivable	60,764	34,419
Tier 1 [Member]
Financing Receivable, Recorded Investment [Line Items]
Net investment in finance leases, 2020	11,951
Net investment in finance leases, 2019	53,257
Net investment in finance leases, 2018	235,653
Net investment in finance leases, 2017	164,342
Net investment in finance leases, 2016	6,373
Net investment in finance leases, Prior	1,141
Total net investment in finance leases	472,717	502,265
Financing receivable, 2020	29,103
Financing receivable, 2019	31,032
Total financing receivable	60,135	33,694
Tier 2 [Member]
Financing Receivable, Recorded Investment [Line Items]
Net investment in finance leases, 2020	5,121
Net investment in finance leases, 2019	28,119
Net investment in finance leases, 2018	13,372
Net investment in finance leases, 2017	4,616
Net investment in finance leases, 2016	1,429
Net investment in finance leases, Prior	5,076
Total net investment in finance leases	57,733	65,103
Financing receivable, 2019	629
Total financing receivable	$ 629	725
Tier 3 [Member]
Financing Receivable, Recorded Investment [Line Items]
Total net investment in finance leases
Total financing receivable

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