Consolidated Statements of Financial Condition (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Mortgage-backed securities, fair value option (in Dollars)	$ 24,911	$ 37,787
Mortgage-backed securities, assets pledged (in Dollars)	679,285	595,631
Other securities, fair value option (in Dollars)	29,577	30,942
Borrowed funds, fair value option (in Dollars)	$ 23,922	$ 26,311
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)	30,743,329	30,904,177
Treasury stock, shares (in Shares)	787,266	626,418