Consolidated Statements Of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Revenues:
Revenue from contracts with customers		$ 633,108	$ 516,338
Principal transactions		138,666	104,032
Interest		161,177	191,071
Other income		9,207	12,209
Total revenues		937,391	819,868
Interest expense		24,357	49,448
Net revenues	[1]	913,034	770,420
Non-interest expenses:
Compensation and benefits		577,179	458,114
Occupancy and equipment rental		66,073	58,862
Communications and office supplies		41,124	35,697
Commissions and floor brokerage		14,842	10,956
Provision for loan losses		18,978	2,283
Other operating expenses		79,732	66,699
Total non-interest expenses		797,928	632,611
Income from operations before income tax expense		115,106	137,809
Provision for income taxes		28,517	38,370
Net income		86,589	99,439
Net income applicable to non-controlling interests			232
Net income applicable to Stifel Financial Corp.		86,589	99,207
Preferred dividends		4,844	2,344
Net income available to common shareholders		$ 81,745	$ 96,863
Earnings per common share:
Basic		$ 1.15	$ 1.35
Diluted		1.07	1.22
Cash dividends declared per common share		$ 0.17	$ 0.15
Weighted-average number of common shares outstanding:
Basic		71,286	71,700
Diluted		76,619	79,210
Commissions [Member]
Revenues:
Revenue from contracts with customers		$ 211,098	$ 155,449
Investment Banking [Member]
Revenues:
Revenue from contracts with customers		179,468	161,840
Asset Management and Service Fees [Member]
Revenues:
Revenue from contracts with customers		$ 237,775	$ 195,267

[1] No individual client accounted for more than 10 percent of total net revenues for the three months ended March 31, 2020 or 2019.