v3.26.1
Fair Value of Financial Instruments (Schedule of Fair Value of Financial Instruments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Dec. 31, 2024
 [4]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Securities purchased under agreements to resell [1] $ 746,375 $ 564,162  
Financial instruments owned 1,657,349 1,427,835  
Available-for-sale securities 1,588,549 1,593,390  
Held-to-maturity securities [2] 6,850,934 6,565,484 [3]  
Securities sold under agreements to repurchase 862,954 [4] 651,236 $ 651,236
Financial instruments sold, but not yet purchased, at fair value 924,385 793,626  
Senior notes 617,649 617,443  
Carrying Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Cash and cash equivalents 2,899,370 2,253,789  
Cash segregated for regulatory purposes 29,196 29,018  
Securities purchased under agreements to resell 746,375 564,162  
Financial instruments owned 1,657,349 1,427,835  
Available-for-sale securities 1,588,549 1,593,390  
Held-to-maturity securities 6,861,227 6,549,054  
Bank loans 21,836,987 21,925,257  
Loans held for sale 348,331 502,199  
Investments 84,585 81,825  
Derivative contracts, Assets [5] 65,558 71,297  
Securities sold under agreements to repurchase 862,954 651,236  
Bank deposits 30,797,336 29,752,063  
Financial instruments sold, but not yet purchased, at fair value 924,385 793,626  
Senior notes 617,649 617,443  
Debentures to Stifel Financial Capital Trusts 55,000 55,000  
Derivative contracts [6] 65,570 71,311  
Estimated Fair Value [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Cash and cash equivalents 2,899,370 2,253,789  
Cash segregated for regulatory purposes 29,196 29,018  
Securities purchased under agreements to resell 746,375 564,162  
Financial instruments owned 1,657,349 1,427,835  
Available-for-sale securities 1,588,549 1,593,390  
Held-to-maturity securities 6,850,934 6,565,484  
Bank loans 21,588,713 21,610,180  
Loans held for sale 348,331 502,199  
Investments 84,585 81,825  
Derivative contracts, Assets [5] 65,558 71,297  
Securities sold under agreements to repurchase 862,954 651,236  
Bank deposits 30,797,148 29,752,095  
Financial instruments sold, but not yet purchased, at fair value 924,385 793,626  
Senior notes 560,861 576,180  
Debentures to Stifel Financial Capital Trusts 51,285 51,582  
Derivative contracts [6] $ 65,570 $ 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 $744.2 million and $561.3 million at March 31, 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] Unrealized gains/(losses) related to available-for-sale securities are reported in accumulated other comprehensive income.
[4] 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 $901.1 million and $687.2 million at March 31, 2026 and December 31, 2025, respectively.
[5] Included in other assets in the consolidated statements of financial condition.
[6] Included in accounts payable and accrued expenses in the consolidated statements of financial condition.