Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenues:
Commissions and fees	$ 103,008	$ 105,264
Recurring	25,340	27,432
Other	3,702	3,679
Total revenues	132,050	136,375
Expenses:
Compensation and employee benefits	49,549	52,587
Transaction processing	21,532	22,223
Occupancy and equipment	16,541	14,649
Telecommunications and data processing services	14,098	15,067
Other general and administrative	18,776	22,677
Interest expense	602	678
Total expenses	121,098	127,881
Income before income tax expense	10,952	8,494
Income tax expense	2,330	3,036
Net income	$ 8,622	$ 5,458
Earnings per share:
Basic (in dollars per share)	$ 0.23	$ 0.14
Diluted (in dollars per share)	$ 0.22	$ 0.14
Basic weighted average number of common shares outstanding (in shares)	37,378	39,112
Diluted weighted average number of common shares outstanding (in shares)	38,615	40,303