Subsequent Events (Narrative) (Details) |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2021 |
Dec. 31, 2020 |
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| Series W Preferred Stock [Member] | ||
| Cumulative preferred stock, dividend rate | 5.20% | 5.20% |
| X | ||||||||||
- Definition The percentage rate used to calculate dividend payments on preferred stock. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Details
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