Investments In Securities and Fair Value (Schedule of Variable Interest Entities) (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Variable Interest Entity, Not Primary Beneficiary [Line Items] | ||
| Carrying Value | $ 20,160 | $ 13,906 |
| Estimated Fair Value | 21,265 | 15,545 |
| Maximum Potential Loss (a) | 25,848 | 16,592 |
| Real estate LLCs or LPs | ||
| Variable Interest Entity, Not Primary Beneficiary [Line Items] | ||
| Carrying Value | 15,669 | 13,238 |
| Estimated Fair Value | 16,774 | 14,877 |
| Maximum Potential Loss (a) | 21,716 | 16,592 |
| Small business investment LPs | ||
| Variable Interest Entity, Not Primary Beneficiary [Line Items] | ||
| Carrying Value | 4,491 | 668 |
| Estimated Fair Value | 4,491 | 668 |
| Maximum Potential Loss (a) | $ 4,132 | $ 0 |