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Statement of Stockholders' Equity Parentheticals (Parentheticals) - $ / shares | 3 Months Ended
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Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020
Common Stock, Dividends, Per Share, Declared | $ 0.14 | $ 0.13 | $ 0.13 | $ 0.13 | $ 0.13 | $ 0.13
EID [Member] | $4.50 Series Preferred Stock [Member] |  |  |  |  |  |
Preferred Stock, Dividends Per Share, Declared | 1.125 | 1.125 | 1.125 | 1.125 | 1.125 | 1.125
EID [Member] | $3.50 Series Preferred Stock [Member] |  |  |  |  |  |
Preferred Stock, Dividends Per Share, Declared | $ 0.875 | $ 0.875 | $ 0.875 | $ 0.875 | $ 0.875 | $ 0.875

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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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