Investment in Loans (Schedule of Consumer Loans: Delinquency Status) (Details) - Consumer loans	Mar. 31, 2024	Dec. 31, 2023
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	85.00%	81.00%
30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Percent past due	6.60%	7.90%
60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Percent past due	4.60%	6.60%
90-119 Days or More Past Due [Member]
Financing Receivable, Past Due [Line Items]
Percent past due	3.10%	4.00%
Financing Receivables, Equal to Greater than 120 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Percent past due	0.70%	0.50%