Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues
Commissions	$ 42,690	$ 39,076	$ 87,592	$ 76,861
Technology products and services	3,220	3,984	6,128	7,092
Information and user access fees	1,790	1,719	3,661	3,408
Investment income	268	310	571	609
Other	857	702	1,608	1,430
Total revenues	48,825	45,791	99,560	89,400
Expenses
Employee compensation and benefits	15,305	15,104	31,146	31,372
Depreciation and amortization	1,961	1,627	3,815	3,189
Technology and communications	3,015	2,724	5,970	5,224
Professional and consulting fees	2,837	2,665	5,861	5,537
Occupancy	757	708	1,516	1,474
Marketing and advertising	1,732	1,248	3,179	2,222
General and administrative	2,018	1,810	4,125	2,811
Total expenses	27,625	25,886	55,612	51,829
Income before income taxes	21,200	19,905	43,948	37,571
Provision for income taxes	8,571	7,968	17,826	14,854
Net income	$ 12,629	$ 11,937	$ 26,122	$ 22,717
Net income per common share
Basic	$ 0.35	$ 0.32	$ 0.72	$ 0.62
Diluted	$ 0.34	$ 0.30	$ 0.69	$ 0.58
Cash dividends declared per common share	$ 0.11	$ 0.09	$ 0.22	$ 0.18
Weighted average common shares
Basic	36,128	36,762	36,531	36,635
Diluted	37,440	39,490	38,067	39,396