Condensed Consolidated Statements of Changes in Equity (Unaudited) (Parentheticals) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Dividends per Common Share	$ 0.72	$ 0.675
Series K Preferred Stock [Member]
Dividends per Depositary share	$ 1.0547
Additional Paid-in Capital [Member]
Sale of interests in investments, tax (in Dollars)	$ 16,000,000
Series H Preferred Stock [Member]
Dividends per Depositary share	$ 1.2938	1.2938
Series I Preferred Stock [Member]
Dividends per Depositary share	1.1250	1.1250
Series J Preferred Stock [Member]
Dividends per Depositary share	$ 1.0313	1.0313
Series K Preferred Stock [Member]
Dividends per Depositary share		$ 1.0547