Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues
Commissions	$ 54,462	$ 51,818	$ 160,766	$ 153,202
Information and post-trade services	7,600	7,125	23,641	18,020
Technology products and services	1,562	1,561	5,585	4,279
Investment income	132	112	416	288
Other	489	517	2,199	2,502
Total revenues	64,245	61,133	192,607	178,291
Expenses
Employee compensation and benefits	18,589	17,910	55,619	47,638
Depreciation and amortization	4,482	3,460	12,954	10,151
Technology and communications	4,359	4,509	13,300	11,700
Professional and consulting fees	3,514	4,540	10,912	13,278
Occupancy	1,127	1,205	3,318	3,172
Marketing and advertising	1,331	1,195	4,340	3,501
General and administrative	2,575	1,926	7,117	6,370
Total expenses	35,977	34,745	107,560	95,810
Income before income taxes from continuing operations	28,268	26,388	85,047	82,481
Provision for income taxes	10,764	8,129	31,877	29,388
Net income from continuing operations	17,504	18,259	53,170	53,093
(Loss) from discontinued operations, net of income taxes		(46)		(210)
Net income	$ 17,504	$ 18,213	$ 53,170	$ 52,883
Basic earnings per common share
Income from continuing operations	$ 0.47	$ 0.49	$ 1.44	$ 1.44
(Loss) from discontinued operations				$ (0.01)
Net income per common share	$ 0.47	$ 0.49	$ 1.44	$ 1.43
Diluted earnings per common share
Income from continuing operations	$ 0.46	$ 0.48	$ 1.40	$ 1.41
(Loss) from discontinued operations				$ (0.01)
Net income per common share	$ 0.46	$ 0.48	$ 1.40	$ 1.40
Cash dividends declared per common share	$ 0.16	$ 0.13	$ 0.48	$ 0.39
Weighted average shares outstanding
Basic	36,856	36,919	36,997	36,854
Diluted	37,805	37,965	37,947	37,820