Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues:
Commissions and fees	$ 93,475	$ 83,485	$ 293,919	$ 277,141
Recurring	18,930	19,214	56,813	63,220
Other	2,126	1,486	6,215	9,102
Total revenues	114,531	104,185	356,947	349,463
Expenses:
Compensation and employee benefits	46,755	45,127	139,433	145,906
Transaction processing	23,428	20,799	73,766	65,731
Occupancy and equipment	14,945	13,849	45,247	41,893
Telecommunications and data processing services	12,189	13,720	36,345	43,341
Restructuring charges				4,355
Other general and administrative	18,670	37,927	53,684	87,663
Interest expense	499	561	1,529	1,668
Total expenses	116,486	131,983	350,004	390,557
(Loss) income before income tax expense (benefit)	(1,955)	(27,798)	6,943	(41,094)
Income tax expense (benefit)	45,012	(3,887)	43,965	(9,460)
Net loss	$ (46,967)	$ (23,911)	$ (37,022)	$ (31,634)
Loss per share:
Basic (in dollars per share)	$ (1.42)	$ (0.73)	$ (1.12)	$ (0.96)
Diluted (in dollars per share)	$ (1.42)	$ (0.73)	$ (1.12)	$ (0.96)
Basic weighted average number of common shares outstanding (in shares)	33,105	32,725	33,060	33,006
Diluted weighted average number of common shares outstanding (in shares)	33,105	32,725	33,060	33,006