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:
Commissions		$ 171,272	$ 194,083	$ 551,306	$ 562,249
Principal transactions		117,002	95,593	364,376	281,794
Investment banking		144,799	118,753	378,582	400,302
Asset management and service fees		144,206	130,636	433,305	364,442
Interest		74,881	43,376	203,488	129,964
Other income		9,209	18,930	33,804	44,471
Total revenues		661,369	601,371	1,964,861	1,783,222
Interest expense		19,383	9,796	50,756	32,914
Net revenues	[1]	641,986	591,575	1,914,105	1,750,308
Non-interest expenses:
Compensation and benefits		434,236	404,205	1,305,372	1,169,896
Occupancy and equipment rental		62,453	53,282	178,455	145,798
Communications and office supplies		31,182	35,678	105,268	96,026
Commissions and floor brokerage		10,777	12,430	34,653	31,623
Other operating expenses		75,356	63,632	202,669	176,480
Total non-interest expenses		614,004	569,227	1,826,417	1,619,823
Income from operations before income tax expense		27,982	22,348	87,688	130,485
Provision for income taxes		10,168	5,169	33,048	49,321
Net income		17,814	17,179	54,640	81,164
Preferred dividends		1,563		1,563
Net income available to common shareholders		$ 16,251	$ 17,179	$ 53,077	$ 81,164
Earnings per common share:
Basic		$ 0.24	$ 0.25	$ 0.79	$ 1.18
Diluted		$ 0.21	$ 0.22	$ 0.69	$ 1.04
Weighted-average number of common shares outstanding:
Basic		66,482	69,633	66,950	68,675
Diluted		77,544	79,759	76,612	78,326

[1] No individual client accounted for more than 10 percent of total net revenues for the three and nine months ended September 30, 2016 or 2015.