Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Commissions and fees	$ 118,926	$ 108,424
Recurring	26,932	25,577
Other	3,869	3,608
Total revenues	149,727	137,609
Expenses:
Compensation and employee benefits	57,408	51,177
Transaction processing	24,573	20,496
Occupancy and equipment	14,372	15,078
Telecommunications and data processing services	12,772	12,697
Other general and administrative	17,757	19,105
Interest expense	505	636
Total expenses	127,387	119,189
Income before income tax expense	22,340	18,420
Income tax expense	5,607	4,800
Net income	$ 16,733	$ 13,620
Earnings per share:
Basic (in dollars per share)	$ 0.49	$ 0.38
Diluted (in dollars per share)	$ 0.47	$ 0.37
Basic weighted average number of common shares outstanding (in shares)	34,268	36,081
Diluted weighted average number of common shares outstanding (in shares)	35,451	37,185