Consolidated Statements Of Financial Condition (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, liquidation preference	$ 1,000	$ 1,000
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	55,000,000	55,000,000
Common stock, shares issued	33,566,772	33,566,772
Common stock, shares outstanding	18,682,568	18,822,556
Treasury stock, shares	14,884,204	14,744,216
Investment Securities [Member]
Encumbered securities available for sale	$ 64,219	$ 31,163
Mortgage-Backed Securities [Member]
Encumbered securities available for sale	$ 339,504	$ 279,841