Statement of Stockholders' Equity Parentheticals (Parentheticals) - $ / shares	3 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Common Stock, Dividends, Per Share, Declared		$ 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