Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Commissions
U.S. high-grade	$ 28,017	$ 21,537	$ 81,225	$ 61,562
Eurobond	4,443	4,075	13,666	14,236
Other	7,362	5,540	21,792	14,121
Total commissions	39,822	31,152	116,683	89,919
Technology products and services	3,779	3,455	10,871	9,870
Information and user access fees	1,831	1,603	5,239	4,959
Investment income	303	301	912	907
Other	829	902	2,259	1,968
Total revenues	46,564	37,413	135,964	107,623
Expenses
Employee compensation and benefits	13,707	14,326	45,079	42,448
Depreciation and amortization	1,799	1,560	4,988	4,798
Technology and communications	2,772	2,543	7,996	7,313
Professional and consulting fees	2,247	2,241	7,784	6,369
Occupancy	721	706	2,195	2,351
Marketing and advertising	1,280	679	3,502	2,066
General and administrative	1,742	1,834	4,553	5,813
Total expenses	24,268	23,889	76,097	71,158
Income before income taxes	22,296	13,524	59,867	36,465
Provision for income taxes	8,852	4,913	23,706	13,984
Net income	$ 13,444	$ 8,611	$ 36,161	$ 22,481
Net income per common share
Basic	$ 0.36	$ 0.24	$ 0.98	$ 0.61
Diluted	$ 0.34	$ 0.22	$ 0.91	$ 0.57
Cash dividends declared per common share	$ 0.09	$ 0.07	$ 0.27	$ 0.21
Weighted average common shares
Basic	37,126	32,945	36,798	33,434
Diluted	39,828	38,744	39,539	39,188