Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 110,122	$ 103,858	$ 319,318	$ 279,906
Other comprehensive income/(loss), net of tax:
Changes in unrealized gains/(losses) on available-for-sale securities	[1],[2],[3],[4]	16,344	(3,138)	58,428	(28,065)
Changes in unrealized gains/(losses) on cash flow hedging instruments	[2],[4],[5]	(477)	(1,523)	(4,260)	1,895
Foreign currency translation adjustment	[2],[4]	(4,106)	(1,336)	(5,239)	(3,434)
Total other comprehensive income/(loss), net of tax		11,761	(5,997)	48,929	(29,604)
Comprehensive income		121,883	97,861	368,247	250,302
Net income applicable to non-controlling interests		708		1,612
Comprehensive income applicable to Stifel Financial Corp.		$ 121,175	$ 97,861	$ 366,635	$ 250,302

[1] As part of the adoption of ASU 2019-04, in the third quarter of 2019, the Company made a one-time election to transfer a portion of its held-to-maturity securities to available-for-sale. The transfer resulted in a net of tax increase to accumulated other comprehensive income of $17.9 million. See Notes 2 and 6 for additional information on the transfer.

[2] Net of tax expense of $4.4 million and tax benefit of $2.1 million for the three months ended September 30, 2019 and 2018, respectively. Net of tax expense of $18.1 million and tax benefit of $10.4 million for the nine months ended September 30, 2019 and 2018, respectively.

[3] Reclassifications to earnings during the three months ended September 30, 2019 were immaterial. Net of reclassifications to earnings of realized losses of $0.2 million for the nine months ended September 30, 2019. There were no reclassifications to earnings during the three and nine months ended September 30, 2018.

[4] The adoption of ASU 2018-02 on January 1, 2018 resulted in a reclassification of $3.0 million to retained earnings related to cash flow hedges and investment portfolio risk.

[5] Amounts are net of reclassifications to earnings of gains of $0.6 million and $1.5 million for the three months ended September 30, 2019 and 2018, respectively. Amounts are net of reclassifications to earnings of gains of $2.9 million and $3.3 million for the nine months ended September 30, 2019 and 2018, respectively.