Consolidated Statements Of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Revenues:
Commissions		$ 175,274	$ 197,930
Principal transactions		116,857	120,948
Investment banking		126,852	100,658
Asset management and service fees		162,739	144,532
Interest		100,953	62,786
Other income		8,752	7,231
Total revenues		691,427	634,085
Interest expense		15,896	14,111
Net revenues	[1]	675,531	619,974
Non-interest expenses:
Compensation and benefits		436,387	411,113
Occupancy and equipment rental		52,545	57,255
Communications and office supplies		33,844	36,660
Commissions and floor brokerage		10,723	11,732
Other operating expenses		63,013	59,301
Total non-interest expenses		596,512	576,061
Income from operations before income tax expense		79,019	43,913
Provision for income taxes		13,507	16,858
Net income		65,512	27,055
Preferred dividends		2,344
Net income available to common shareholders		$ 63,168	$ 27,055
Earnings per common share:
Basic		$ 0.92	$ 0.40
Diluted		$ 0.78	$ 0.36
Weighted-average number of common shares outstanding:
Basic		68,386	67,579
Diluted		80,695	76,086

[1] No individual client accounted for more than 10 percent of total net revenues for the three months ended March 31, 2017 or 2016.