Fair Value Of Financial Instruments (Estimated Fair Values Of Financial Instruments Not Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2022		Dec. 31, 2021	Dec. 31, 2020	[1]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities purchased under agreements to resell	$ 608,051		$ 579,866
Held-to-maturity securities	5,595,681	[1]	5,343,481	$ 5,343,481
Securities sold under agreements to repurchase	350,206		385,528
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash	1,574,488		1,960,322
Cash segregated for regulatory purposes	30,161		186,331
Securities purchased under agreements to resell	608,051		579,866
Held-to-maturity securities	5,595,681		5,343,481
Bank loans	18,740,079		16,704,912
Loans held for sale	288,676		207,715
Securities sold under agreements to repurchase	350,206		385,528
Bank deposits	24,856,580		22,998,842
Senior notes	1,076,610		1,218,344
Debentures to Stifel Financial Capital Trusts	54,468		46,340
Fair Value, Measurements, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash	1,574,488		1,960,322
Cash segregated for regulatory purposes	30,161		186,331
Securities purchased under agreements to resell	425,461		371,797
Securities sold under agreements to repurchase			10,000
Senior notes	1,076,610		1,218,344
Fair Value, Measurements, Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities purchased under agreements to resell	182,590		208,069
Held-to-maturity securities	5,487,075		5,205,085
Bank loans	18,740,079		16,704,912
Loans held for sale	288,676		207,715
Securities sold under agreements to repurchase	350,206		375,528
Bank deposits	24,856,580		22,998,842
Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity securities	108,606		138,396
Debentures to Stifel Financial Capital Trusts	$ 54,468		$ 46,340

[1] 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.