Receivables and Payables (Tables)

6 Months Ended

Jun. 30, 2011

Receivables and Payables

Summary of receivables from, and payables to, customers

	Receivables from						Payables to
	June 30, 2011			December 31, 2010			June 30, 2011		December 31, 2010
Broker-dealers	$	807,740		$	246,560		$	776,696	$	403,432
Clearing organizations	408,854			413			32		108,526
Securities borrowed	618,100			618,662			—		—
Securities loaned	—			—			630,508		628,000
Allowance for doubtful accounts	(351		)	(384		)	—		—
Total	$	1,834,343		$	865,251		$	1,407,236	$	1,139,958

Summary of receivables from, and payables to, customers

	Receivables from						Payables to
	June 30, 2011			December 31, 2010			June 30, 2011		December 31, 2010
Customers	$	1,142,046		$	607,286		$	1,478,360	$	272,027
Allowance for doubtful accounts	(1,168		)	(1,030		)	—		—
Total	$	1,140,878		$	606,256		$	1,478,360	$	272,027

Schedule of interest earned and interest incurred on securities borrowed and loaned

	Three Months Ended June 30,						Six Months Ended June 30,
	2011			2010			2011			2010
Interest earned	$	6,328		$	1,159		$	9,680		$	1,326
Interest incurred	(5,003		)	(779		)	(7,420		)	(843		)
Net	$	1,325		$	380		$	2,260		$	483