Consolidated Statements of Financial Condition (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Securities held-to-maturity, at fair value	$ 18,212	$ 20,054
Preferred stock, shares authorized	1,000,000	1,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	91,284,000	88,228,000
Common stock, shares outstanding	81,325,000	77,952,000
Treasury stock, shares	9,959,000	10,276,000