Condensed Consolidated Statements Of Financial Condition (Parenthetical) (USD $) In Thousands, except Per Share data	Sep. 30, 2011	Dec. 31, 2010
Condensed Consolidated Statements Of Financial Condition [Abstract]
Convertible preferred stock, par value	$ 0.01	$ 0.01
Convertible preferred stock, shares authorized	5,000	5,000
Convertible preferred stock, shares issued	0	0
Convertible preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000	50,000
Common stock, shares issued	24,472	24,011
Common stock, shares outstanding	24,472	24,011