Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Common cash dividends declared, per share (in Dollars per share)	$ 0.04
Common Stock [Member]
Proceeds from issuance of common stock, Employee Stock Purchase Plan, Shares	5,054	5,679
Proceeds from issuance of common stock, stock options exercised, shares	30,331	9,688
Exchange of common stock, restricted stock vested, shares	3,939	3,272