Investment in Loans (Schedule of Consumer Loans: Delinquency Status) (Details) - Consumer loans	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Percent past due	100.00%	100.00%
Financial Asset, 1 to 29 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Percent past due	96.10%	90.40%
30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Percent past due	1.80%	3.40%
60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Percent past due	1.20%	3.30%
90-119 Days or More Past Due [Member]
Financing Receivable, Past Due [Line Items]
Percent past due	0.80%	2.80%
Financing Receivables, Equal to Greater than 120 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Percent past due	0.10%	0.10%