Investment in Loans (Schedule of Consumer Loans: Delinquency Status) (Details) - Consumer loans |
Mar. 31, 2019 |
|---|---|
| Financing Receivable, Recorded Investment, Past Due [Line Items] | |
| Current | 95.90% |
| Percent past due | 100.00% |
| 30 to 59 Days Past Due [Member] | |
| Financing Receivable, Recorded Investment, Past Due [Line Items] | |
| Percent past due | 1.70% |
| 60 to 89 Days Past Due [Member] | |
| Financing Receivable, Recorded Investment, Past Due [Line Items] | |
| Percent past due | 1.30% |
| 90-119 Days or More Past Due [Member] | |
| Financing Receivable, Recorded Investment, Past Due [Line Items] | |
| Percent past due | 1.10% |