Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Series C Preferred Stock [Member]
Issuance of stock (in shares)		286,888
Cash dividends declared on preferred stock (in dollars per share)	$ 0.45	$ 0.225
Series D Preferred Stock [Member]
Issuance of stock (in shares)		133,705
Cash dividends declared on preferred stock (in dollars per share)	$ 0.40	$ 0.20
Issuance of stock (in shares)		419,173
Issuance of common stock for restricted stock awards, including tax benefit (in shares)	10,000	8,400
Cash dividends declared on common stock (in dollars per share)	$ 1.16	$ 1.12