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Subsequent Events (Narrative) (Details) - 6% Convertible Exchangeable Preferred Stock [Member] - $ / shares			9 Months Ended	12 Months Ended
	Nov. 01, 2021	Sep. 08, 2021	Sep. 30, 2021	Dec. 31, 2020
Subsequent Event [Line Items]
Dividend declared, date		Sep. 08, 2021
Preferred stock dividend declared, amount per share		$ 0.15
Preferred stock, dividend rate (in percent)			6.00%	6.00%
Subsequent Events [Member]
Subsequent Event [Line Items]
Dividends payable, date to be paid	Nov. 01, 2021
Dividend, record date	Oct. 15, 2021
Preferred stock, dividends per share, cash paid	$ 0.15

X

- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586

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X

- Definition

Date the dividend to be paid was declared, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586

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- Definition

Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

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X

- Definition

The percentage rate used to calculate dividend payments on preferred stock.

+ References

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- Definition

Aggregate dividends paid during the period for each share of preferred stock outstanding.

+ References

No definition available.

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- Definition

Aggregate dividends declared during the period for each share of preferred stock outstanding.

+ References

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

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