Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenues:
Commissions and fees	$ 105,264	$ 118,676
Recurring	27,432	27,221
Other	3,679	4,181
Total revenues	136,375	150,078
Expenses:
Compensation and employee benefits	52,587	57,478
Transaction processing	22,223	23,026
Telecommunications and data processing services	15,067	15,071
Occupancy and equipment	14,649	14,942
Other general and administrative	22,677	22,160
Interest expense	678	270
Total expenses	127,881	132,947
Income before income tax expense	8,494	17,131
Income tax expense	3,036	7,582
Net income	$ 5,458	$ 9,549
Earnings per share:
Basic (in dollars per share)	$ 0.14	$ 0.23
Diluted (in dollars per share)	$ 0.14	$ 0.23
Basic weighted average number of common shares outstanding (in shares)	39,112	41,435
Diluted weighted average number of common shares outstanding (in shares)	40,303	42,180