CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash dividends per share common stock (in dollars per share)	$ 0.80	$ 0.68	$ 0.59
Purchase of treasury stock (in shares)			1,761
Issuance of common stock (in shares)	5,389,584	2,226,779	4,525,904
Issuance of shares of Series E preferred stock (in shares)	11,500
Series D Preferred Stock
Cash dividends per share preferred stock (in dollars per share)			$ 52.50
Preferred Stock
Cash dividends per share preferred stock (in dollars per share)	$ 386.94