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Consolidated Statements Of Financial Condition (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Consolidated Statements Of Financial Condition [Abstract]    
Investments at fair value $ 268,082 $ 236,434
Preferred stock, shares authorized 0 0
Preferred stock, shares issued 3,000,000 3,000,000