Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - $ / shares	3 Months Ended			12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Stockholders' Equity [Abstract]
Common stock cash dividend per share	$ 0.0625	$ 0.0625	$ 0.0625	$ 0	$ 0.1875	$ 0.25