Investment in Loans (Schedule of Consumer Loans: Delinquency Status) (Details) - Consumer loans	Dec. 31, 2020	Dec. 31, 2019
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	90.40%	95.30%
30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Percent past due	3.40%	2.10%
60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Percent past due	3.30%	1.40%
90-119 Days or More Past Due [Member]
Financing Receivable, Past Due [Line Items]
Percent past due	2.80%	1.20%
Financing Receivables, Equal to Greater than 120 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Percent past due	0.10%	0.00%