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Subsequent Events (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Feb. 04, 2022 | Jan. 12, 2022 | Aug. 31, 2020 | Aug. 10, 2020 | Dec. 31, 2021 | Dec. 31, 2020
Subsequent Event [Line Items] |  |  |  |  |  |
Preferred stock redeemed, value |  |  |  |  |  | $ 10,485
Subsequent Event [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Date declared |  | Jan. 12, 2022 |  |  |  |
Dividends per common share |  | $ 0.16 |  |  |  |
Date of record |  | Feb. 01, 2022 |  |  |  |
Date paid |  | Feb. 15, 2022 |  |  |  |
Series F Preferred Stock [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Preferred stock redeemed, shares |  |  | 6,465 |  |  |
Preferred stock, dividend rate |  |  | 6.00% |  |  | 6.00%
Preferred stock, redemption price |  |  | $ 1,000 |  |  |
Preferred stock redeemed, value |  |  | $ 6,500 |  |  |
Series C Preferred Stock [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Preferred stock redeemed, shares |  |  |  | 388 |  |
Preferred stock, dividend rate |  |  |  | 6.00% |  | 6.00%
Preferred stock, redemption price |  |  |  | $ 10,000 |  |
Preferred stock redeemed, value |  |  |  | $ 3,900 |  |
Series G Preferred Stock [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Preferred stock, dividend rate |  |  |  |  | 6.00% | 6.00%
Series G Preferred Stock [Member] | Subsequent Event [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Preferred stock redeemed, shares | 533 |  |  |  |  |
Preferred stock, dividend rate | 6.00% |  |  |  |  |
Preferred stock, redemption price | $ 10,000 |  |  |  |  |
Preferred stock redeemed, value | $ 5,300 |  |  |  |  |

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
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- Definition Date the declared dividend will be paid, in YYYY-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=123431023&loc=d3e4304-108586 + Details
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