Consolidated Statements of Changes in Shareholders' Equity (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Retained Earnings [Member]
Cash dividends declared – preferred, per share (in dollars per share)			$ 39.50
Cash dividends declared – common, per share (in dollars per share)	$ 0.425	$ 0.31
Cash dividends declared – common, per share (in dollars per share)	$ 0.425	$ 0.31