Consolidated Statements of Stockholders' Equity and Mezzanine Equity (Unaudited) (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Statement of Stockholders' Equity [Abstract]
Cash dividends (in dollars per share)	$ 0.72	$ 0.60
Treasury stock purchases (in shares)	18,140	6,666
Redeemable common shares acquired included in treasury stock (in shares)	10,442
Issuance of common stock (in shares)	78,736
Number of shares acquired by ESOP (in shares)	6,299	7,570