Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues
Commissions	$ 42,379	$ 39,822	$ 129,971	$ 116,683
Technology products and services	2,979	3,779	9,107	10,871
Information and user access fees	1,896	1,831	5,557	5,239
Investment income	251	303	822	912
Other	752	829	2,360	2,259
Total revenues	48,257	46,564	147,817	135,964
Expenses
Employee compensation and benefits	14,636	13,707	45,782	45,079
Depreciation and amortization	2,081	1,799	5,896	4,988
Technology and communications	3,262	2,772	9,232	7,996
Professional and consulting fees	3,202	2,247	9,063	7,784
Occupancy	732	721	2,248	2,195
Marketing and advertising	1,067	1,280	4,246	3,502
General and administrative	2,068	1,742	6,193	4,553
Total expenses	27,048	24,268	82,660	76,097
Income before income taxes	21,209	22,296	65,157	59,867
Provision for income taxes	7,727	8,852	25,553	23,706
Net income	$ 13,482	$ 13,444	$ 39,604	$ 36,161
Net income per common share
Basic	$ 0.37	$ 0.36	$ 1.08	$ 0.98
Diluted	$ 0.36	$ 0.34	$ 1.05	$ 0.91
Cash dividends declared per common share	$ 0.11	$ 0.09	$ 0.33	$ 0.27
Weighted average common shares
Basic	36,500	37,126	36,521	36,798
Diluted	37,541	39,828	37,892	39,539