Securities Owned and Sold, Not Yet Purchased (Tables)

9 Months Ended

Sep. 30, 2011

Securities Owned and Sold, Not Yet Purchased

Summary of securities owned and securities sold, not yet purchased

	Securities Owned				Securities Sold, Not Yet Purchased
	September 30, 2011		December 31, 2010		September 30, 2011		December 31, 2010
Corporate stocks—trading securities	$	1,348	$	19,051	$	1,395	$	19,362
Corporate stocks—available-for-sale	—		1,662		—		—
Mutual funds	4,542		5,076		—		—
Total	$	5,890	$	25,789	$	1,395	$	19,362

Unrealized holding gains and losses on available-for-sale securities, net of tax recorded in accumulated other comprehensive income

	After-Tax Unrealized Holding Gain/(Loss)
	September 30, 2011		December 31, 2010
Positions with net gains	$	—	$	86
Positions with net (losses)	—		—
Total gain/(loss)	$	—	$	86