Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 449,986	$ 393,968	$ 182,871
Other comprehensive income/(loss), net of tax:
Changes in unrealized gains/(losses) on available-for-sale securities, net of tax	[1],[2],[3],[4]	60,288	(36,254)	4,730
Changes in unrealized losses on cash flow hedging instruments, net of tax	[3],[4],[5]	(4,402)	(792)	(320)
Foreign currency translation adjustment, net of tax	[3],[4]	4,932	(5,691)	7,896
Total other comprehensive income/(loss), net of tax		60,818	(42,737)	12,306
Comprehensive income		510,804	351,231	195,177
Net income applicable to non-controlling interest		1,590
Comprehensive income applicable to Stifel Financial Corp.		$ 509,214	$ 351,231	$ 195,177

[1] Amounts are net of reclassifications to earnings of realized losses of $0.2 million and $2.9 million and realized gains of $0.2 million for the years ended December 31, 2019, 2018, and 2017, respectively.

[2] 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 7 for additional information on the transfer.

[3] Net of a tax expense of $20.2 million, tax benefit of $11.2 million, and tax expense of $3.3 million for the years ended December 31, 2019, 2018, and 2017, respectively.

[4] The adoption of ASU 2018-02 on January 1, 2018, resulted in a reclassification of $3.1 million to retained earnings related to cash flow hedges and investment portfolio risk. The reclassification is reflected in the activity for the year ended December 31, 2018. See Note 2 for further details.

[5] Amounts are net of reclassifications to earnings of gains of $3.3 million and $4.9 million and losses of $0.6 million for the years ended December 31, 2019, 2018, and 2017, respectively.