Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues:
Commissions and fees	$ 405,679	$ 436,172	$ 408,619
Recurring	107,184	103,794	104,172
Other	121,940	19,848	18,010
Total revenues	634,803	559,814	530,801
Expenses:
Compensation and employee benefits	209,323	215,758	201,254
Transaction processing	91,492	86,400	83,792
Occupancy and equipment	57,495	59,811	69,022
Telecommunications and data processing services	51,523	51,187	53,607
Other general and administrative	101,915	79,349	77,431
Restructuring charges			(75)
Interest expense	1,829	2,322	2,715
Total expenses	513,577	494,827	487,746
Income before income tax expense	121,226	64,987	43,055
Income tax expense	29,656	14,095	11,970
Net income	$ 91,570	$ 50,892	$ 31,085
Income per share:
Basic (in dollars per share)	$ 2.70	$ 1.44	$ 0.84
Diluted (in dollars per share)	$ 2.63	$ 1.40	$ 0.82
Basic weighted average number of common shares outstanding (in shares)	33,907	35,349	36,788
Diluted weighted average number of common shares outstanding (in shares)	34,815	36,365	38,114