Fair Value Of Financial Instruments (Schedule Of Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands		Sep. 30, 2022		Jun. 30, 2022	Dec. 31, 2021	Dec. 31, 2020	[2]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities purchased under agreements to resell		$ 541,840			$ 579,866
Financial instruments owned		997,686			1,157,004
Available-for-sale securities		1,660,847	[1]		2,113,893
Held-to-maturity securities		5,665,534	[2]		5,343,481	$ 5,343,481
Derivative contracts, Assets	[3]				52,129
Securities sold under agreements to repurchase		257,759			385,528
Financial instruments sold, but not yet purchased, at fair value		637,714			756,150
Senior notes		1,114,285			1,113,478
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		1,414,543			1,963,326
Cash segregated for regulatory purposes		31,869			186,331
Securities purchased under agreements to resell		541,840			579,866
Financial instruments owned		997,686			1,157,004
Available-for-sale securities		1,660,847			2,113,893
Held-to-maturity securities		5,991,450			5,348,558
Bank loans					16,627,847
Loans held for sale		234,927			207,715
Investments		101,296			117,804
Derivative contracts, Assets	[3]			$ 152,119	52,129
Securities sold under agreements to repurchase		257,759			385,528
Bank deposits		27,190,619			23,280,348
Financial instruments sold, but not yet purchased, at fair value		637,714			756,150
Senior notes		1,114,285			1,113,478
Debentures to Stifel Financial Capital Trusts		60,000			60,000
Derivative contracts	[4]			152,107	52,147
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		1,414,543			1,963,326
Cash segregated for regulatory purposes		31,869			186,331
Securities purchased under agreements to resell		541,840			579,866
Financial instruments owned				997,686	1,157,004
Available-for-sale securities		1,660,847			2,113,893
Held-to-maturity securities				5,665,534	5,343,481
Bank loans		20,229,657			16,704,912
Loans held for sale		234,927			207,715
Investments		101,296			117,804
Derivative contracts, Assets	[3]			152,119	52,129
Securities sold under agreements to repurchase		257,759			385,528
Bank deposits		24,638,897			22,998,842
Financial instruments sold, but not yet purchased, at fair value		637,714			756,150
Senior notes		1,040,587			1,218,344
Debentures to Stifel Financial Capital Trusts		$ 54,771			46,340
Derivative contracts	[4]			$ 152,107	$ 52,147

[1] Due to the immaterial amount of income recognized on tax-exempt securities, yields were not calculated on a tax-equivalent basis.

[2] Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements.

[3] Included in other assets in the consolidated statements of financial condition.

[4] Included in accounts payable and accrued expenses in the consolidated statements of financial condition.