Consolidated Statements of Financial Condition (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Other securities, fair value option	$ 34,152	$ 35,408
Mortgage-backed securities, fair value option	1,898	2,016
Other securities, fair value option	$ 28,526	$ 28,429
Preferred stock, par value (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, shares issued (in shares)	31,530,595	31,530,595
Common stock, shares outstanding (in shares)	28,811,160	28,632,904
Treasury stock, at average cost (in shares)	2,719,435	2,897,691
Collateralized Mortgage Backed Securities [Member]
Mortgage-backed securities, assets pledged	$ 91,929	$ 145,860
Other Securities [Member]
Mortgage-backed securities, assets pledged	$ 136,143	$ 82,064