Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues:
Commissions and fees	$ 108,868	$ 94,883	$ 211,876	$ 200,147
Recurring	26,283	28,034	51,623	55,466
Other	4,142	3,993	7,844	7,672
Total revenues	139,293	126,910	271,343	263,285
Expenses:
Compensation and employee benefits	51,202	49,540	100,751	102,127
Transaction processing	22,499	19,649	44,031	41,872
Occupancy and equipment	20,720	15,063	37,261	29,712
Telecommunications and data processing services	13,718	14,712	27,816	29,779
Other general and administrative	19,760	23,597	38,536	46,274
Goodwill impairment		274,285		274,285
Restructuring charges	(75)		(75)
Interest expense	699	624	1,301	1,302
Total expenses	128,523	397,470	249,621	525,351
Income (loss) before income tax benefit	10,770	(270,560)	21,722	(262,066)
Income tax expense (benefit)	5,684	(23,464)	8,014	(20,428)
Net income (loss)	$ 5,086	$ (247,096)	$ 13,708	$ (241,638)
Income (loss) per share:
Basic (in dollars per share)	$ 0.14	$ (6.40)	$ 0.37	$ (6.22)
Diluted (in dollars per share)	$ 0.13	$ (6.40)	$ 0.36	$ (6.22)
Basic weighted average number of common shares outstanding (in shares)	36,956	38,607	37,166	38,859
Diluted weighted average number of common shares outstanding (in shares)	38,000	38,607	38,371	38,859