CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues
Trading revenues, net	$ 113,829	$ 277,677	$ 524,649	$ 657,222
Commissions and fees	87,842	95,027	288,904	282,358
Interest, net	677	(1,080)	1,061	(1,699)
Investment income and other, net	6,184	5,412	59,256	397,193
Total revenues	208,532	377,036	873,870	1,335,074
Expenses
Employee compensation and benefits	49,006	121,597	222,684	337,786
Execution and clearance fees	71,995	67,502	219,371	198,573
Communications and data processing	36,733	35,256	108,766	103,260
Depreciation and amortization	21,876	23,813	66,015	65,154
Payments for order flow	13,845	17,121	39,590	47,277
Collateralized financing interest	10,693	8,617	29,465	25,932
Occupancy and equipment rentals	9,275	7,472	28,094	22,286
Debt interest expense	9,153	9,958	27,836	30,266
Professional fees	4,139	4,406	15,497	21,281
Business development	994	1,846	4,073	6,728
Debt extinguishment charges	0	0	0	25,006
Writedown of assets and other real estate related charges	0	34,029	0	40,488
Other	8,797	10,000	25,923	26,604
Total expenses	236,506	341,617	787,314	950,641
(Loss) income before income taxes	(27,974)	35,419	86,556	384,433
Income tax (benefit) expense	(16,760)	13,482	27,051	132,357
Net (loss) income	$ (11,214)	$ 21,937	$ 59,505	$ 252,076
Basic (loss) earnings per share (in dollars per share)	$ (0.13)	$ 0.24	$ 0.69	$ 2.42
Diluted (loss) earnings per share (in dollars per share)	$ (0.13)	$ 0.24	$ 0.67	$ 2.36
Shares used in computation of basic (loss) earnings per share	85,009	91,134	86,531	104,244
Shares used in computation of diluted (loss) earnings per share	85,009	92,079	88,481	106,816