Consolidated Statements Of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Revenues
Revenue from contracts with customers		$ 516,338	$ 541,656
Principal transactions		104,032	97,782
Interest		191,071	137,734
Other income		12,209	3,357
Total revenues		819,868	776,811
Interest expense		49,448	26,453
Net revenues	[1]	770,420	750,358
Non-interest expenses
Compensation and benefits		458,114	457,893
Occupancy and equipment rental		58,862	57,595
Communications and office supplies		35,697	33,499
Commissions and floor brokerage		10,956	9,365
Other operating expenses		68,982	72,452
Total non-interest expenses		632,611	630,804
Income from operations before income tax expense		137,809	119,554
Provision for income taxes		38,370	30,793
Net income		99,439	88,761
Net income applicable to non-controlling interests		232
Net income applicable to Stifel Financial Corp.		99,207	88,761
Preferred dividends		2,344	2,344
Net income available to common shareholders		$ 96,863	$ 86,417
Earnings per common share
Basic		$ 1.35	$ 1.20
Diluted		1.22	1.06
Cash dividends declared per common share		$ 0.15	$ 0.12
Weighted-average number of common shares outstanding
Basic		71,700	71,999
Diluted		79,210	81,789
Commissions [Member]
Revenues
Revenue from contracts with customers		$ 155,449	$ 165,775
Investment Banking [Member]
Revenues
Revenue from contracts with customers		161,840	176,362
Asset Management and Service Fees [Member]
Revenues
Revenue from contracts with customers		$ 195,267	$ 195,801

[1] No individual client accounted for more than 10 percent of total net revenues for the three months ended March 31, 2019 or 2018.