Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 107,887	$ 109,757	$ 194,476	$ 209,196
Other comprehensive income/(loss), net of tax:
Changes in unrealized gains on available-for-sale securities	[1],[2]	76,571	16,284	3,344	42,084
Changes in unrealized gains/(losses) on cash flow hedging instruments	[2],[3]	4,023	(1,957)	2,317	(3,783)
Foreign currency translation adjustment	[2]	(156)	(3,301)	(9,978)	(1,133)
Total other comprehensive income/(loss), net of tax		80,438	11,026	(4,317)	37,168
Comprehensive income		188,325	120,783	190,159	246,364
Net income applicable to non-controlling interests			672		904
Comprehensive income applicable to Stifel Financial Corp.		$ 188,325	$ 120,111	$ 190,159	$ 245,460

[1] Net of reclassifications to earnings of realized gains of $0.2 million for the three months ended June 30, 2020. Net of reclassifications to earnings of realized losses of $0.3 million for the six months ended June 30, 2020. Net of reclassifications to earnings of realized losses of $0.2 million for the three and six months ended June 30, 2019.

[2] Net of tax expense of $26.1 million and $3.9 million for the three months ended June 30, 2020 and 2019, respectively. Net of tax benefit of $1.4 million and tax expense of $13.7 million for the six months ended June 30, 2020 and 2019, respectively.

[3] Amounts are net of reclassifications to earnings of gains of $0.2 million and $0.8 million for the three months ended June 30, 2020 and 2019, respectively. Reclassifications to earnings were immaterial for the six months ended June 30, 2020. Net of reclassifications to earnings of gains of $2.3 million for the six months ended June 30, 2019.