Assets and Liabilities, at Fair Value (Narrative) (Details) - USD ($) $ in Thousands |
Sep. 30, 2019 |
Jun. 30, 2019 |
|---|---|---|
| Fair Value Disclosures [Abstract] | ||
| Redemption rate, percentage | 100.00% | |
| Commemorative coin inventory, held at lower of cost or net realizable value | $ (2,336) | $ (17) |
| X | ||||||||||
- Definition Fair Value Disclosure, Redemption Rate No definition available.
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| X | ||||||||||
- Definition Inventory, Commemorative Coin, Stated At Lower Cost Or Market No definition available.
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| X | ||||||||||
- References No definition available.
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