Statement of Stockholders' Equity Parentheticals (Parentheticals) - $ / shares	3 Months Ended
	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