Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Retained Earnings [Member]
Common cash dividends declared, dividends per share (in dollars per share)	$ 0.16	$ 0.08	$ 0.08
Preferred Stock [Member]
Redemption of Series F Non-cumulative Perpetual Preferred Stock, shares (in shares)			29,867
Common Stock [Member]
Proceeds from issuance of common stock, Employee Stock Purchase Plan, Shares (in shares)	20,192	24,033	25,321
Proceeds from issuance of common stock, stock options exercised, shares (in shares)	111,423	79,638	23,659
Restricted stock awards, shares (in shares)	21,882	28,846	30,055
Exchange of common stock, restricted stock vested (in shares)			10,300
Proceeds from issuance of common stock, net of issuance costs, shares (in shares)	1,215,000	3,680,000
Retirement of treasury stock, shares (in shares)		121,246
Exchange of common stock in connection with stock options exercised and restricted stock vested, shares (in shares)	22,735	4,631
Common cash dividends declared, dividends per share (in dollars per share)	$ 0.16	$ 0.08	$ 0.08
Proceeds from issuance of common stock, stock options exercised, shares (in shares)	111,423	79,638	23,659