Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Investment securities held to maturity, at fair value	$ 223,247	$ 171,845
Loans receivable, allowance for loan losses	$ 9,453	$ 8,703
Preferred stock par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	38,446,223	38,365,848
Common stock, shares outstanding (in shares)	37,917,378	37,837,003
Treasury stock (in shares)	503,408	503,408
Stock held by deferred compensation plan (in shares)	25,437	25,437