Consolidated Statements of Financial Condition (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Held to maturity securities, fair value	$ 42,849	$ 25,090
Loans receivable, allowance	$ 18,992	$ 15,584
Preferred stock, par stock (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (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, issued (in shares)	37,767,613	37,618,597
Common stock, shares outstanding (in shares)	37,767,613	37,618,597