v3.26.1
Fair Value Of Financial Instruments (Schedule of Fair Value of Financial Instruments) (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Securities purchased under agreements to resell [1] $ 798,907 $ 564,162
Financial instruments owned 1,699,070 1,427,835
Available-for-sale securities 1,529,505 1,593,390
Held-to-maturity securities [2] 6,895,122 6,565,484
Securities sold under agreements to repurchase [3] 1,095,619 651,236
Financial instruments sold, but not yet purchased, at fair value 962,970 793,626
Senior notes 617,855 617,443
Carrying Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 2,191,628 2,253,789
Cash segregated for regulatory purposes 30,068 29,018
Securities purchased under agreements to resell 798,907 564,162
Financial instruments owned 1,699,070 1,427,835
Available-for-sale securities 1,529,505 1,593,390
Held-to-maturity securities 6,881,353 6,549,054
Bank loans 24,431,513 21,925,257
Loans held for sale 373,591 502,199
Investments 85,274 81,825
Derivative contracts, Assets [4] 70,457 71,297
Securities sold under agreements to repurchase 1,095,619 651,236
Bank deposits 32,264,006 29,752,063
Financial instruments sold, but not yet purchased, at fair value 962,970 793,626
Federal Home Loan Bank advances 450,000  
Senior notes 617,855 617,443
Debentures to Stifel Financial Capital Trusts 55,000 55,000
Derivative contracts [5] 70,466 71,311
Estimated Fair Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 2,191,628 2,253,789
Cash segregated for regulatory purposes 30,068 29,018
Securities purchased under agreements to resell 798,907 564,162
Financial instruments owned 1,699,070 1,427,835
Available-for-sale securities 1,529,505 1,593,390
Held-to-maturity securities 6,895,122 6,565,484
Bank loans 24,251,223 21,610,180
Loans held for sale 373,591 502,199
Investments 85,274 81,825
Derivative contracts, Assets [4] 70,457 71,297
Securities sold under agreements to repurchase 1,095,619 651,236
Bank deposits 32,263,766 29,752,095
Financial instruments sold, but not yet purchased, at fair value 962,970 793,626
Federal Home Loan Bank advances 450,000  
Senior notes 563,264 576,180
Debentures to Stifel Financial Capital Trusts 50,493 51,582
Derivative contracts [5] $ 70,466 $ 71,311
[1] Available collateral includes securities received from the counterparty. These securities are not included on the consolidated statements of financial condition unless there is an event of default. The fair value of securities received as collateral was $794.0 million and $561.3 million at June 30, 2026 and December 31, 2025, respectively.
[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] Collateral pledged includes the fair value of securities pledged to the counterparty. These securities are included on the consolidated statements of financial condition unless we default. Collateral pledged by our company to the counterparty includes U.S. government agency securities, U.S. government securities, and corporate fixed income securities with market values of $1.0 billion and $687.2 million at June 30, 2026 and December 31, 2025, respectively.
[4] Included in other assets in the consolidated statements of financial condition.
[5] Included in accounts payable and accrued expenses in the consolidated statements of financial condition.