Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues
Commissions	$ 54,315	$ 54,198	$ 106,304	$ 101,384
Information and post-trade services	7,962	7,192	16,041	10,895
Technology products and services	1,987	1,485	4,023	2,718
Investment income	138	44	284	176
Other	562	588	1,710	1,985
Total revenues	64,964	63,507	128,362	117,158
Expenses
Employee compensation and benefits	18,421	14,712	37,030	29,728
Depreciation and amortization	4,351	4,405	8,472	6,691
Technology and communications	4,449	4,045	8,941	7,191
Professional and consulting fees	3,426	4,435	7,398	8,738
Occupancy	1,102	1,170	2,191	1,967
Marketing and advertising	1,800	1,371	3,009	2,306
General and administrative	2,344	1,947	4,542	4,444
Total expenses	35,893	32,085	71,583	61,065
Income before income taxes from continuing operations	29,071	31,422	56,779	56,093
Provision for income taxes	10,880	12,133	21,113	21,259
Net income from continuing operations	18,191	19,289	35,666	34,834
Income (loss) from discontinued operations, net of income taxes		54		(165)
Net income	$ 18,191	$ 19,343	$ 35,666	$ 34,669
Basic earnings per common share
Income from continuing operations	$ 0.49	$ 0.52	$ 0.96	$ 0.94
Income (loss) from discontinued operations
Net income per common share	$ 0.49	$ 0.52	$ 0.96	$ 0.94
Diluted earnings per common share
Income from continuing operations	$ 0.48	$ 0.51	$ 0.94	$ 0.92
Income (loss) from discontinued operations
Net income per common share	$ 0.48	$ 0.51	$ 0.94	$ 0.92
Cash dividends declared per common share	$ 0.16	$ 0.13	$ 0.32	$ 0.26
Weighted average shares outstanding
Basic	37,015	36,868	37,068	36,821
Diluted	37,942	37,819	38,019	37,746