Condensed Consolidated Statements of Changes in Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Series I Preferred Stock [Member]
Dividends Per Depositary Share (in dollars per share)	$ 0.375	$ 0.375
Series J Preferred Stock [Member]
Dividends Per Depositary Share (in dollars per share)	0.3438	0.3438
Series K Preferred Stock [Member]
Dividends Per Depositary Share (in dollars per share)	0.3516	0.3516
Dividends Per Common Share (in dollars per share)	$ 0.27	$ 0.255