Consolidated Statements of Financial Condition (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Allowance for accounts receivables	$ 1,086	$ 427
Series A Preferred stock, par value	$ 0.001	$ 0.001
Series A Preferred stock, shares authorized	4,855,000	4,855,000
Series A Preferred stock, shares issued
Series A Preferred stock, shares outstanding
Treasury stock, shares	1,541,739	4,803,740
Common Stock Voting
Common stock, par value	$ 0.003	$ 0.003
Common stock, shares authorized	110,000,000	110,000,000
Common stock, shares issued	37,725,394	35,945,001
Common stock, shares outstanding	36,183,655	31,141,261
Common Stock Non-Voting
Common stock, par value	$ 0.003	$ 0.003
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	2,585,654	2,585,654
Common stock, shares outstanding	2,585,654	2,585,654
Series B Preferred Stock
Series B Preferred stock, par value	$ 0.001	$ 0.001
Series B Preferred stock, shares authorized	35,000	35,000
Series B Preferred stock, shares issued	0	35,000
Series B Preferred stock, shares outstanding	0	35,000
Series A Preferred Stock
Series A Preferred stock, par value	$ 0.001	$ 0.001
Series A Preferred stock, shares authorized	110,000	110,000
Series A Preferred stock, shares issued
Series A Preferred stock, shares outstanding