75000 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 75010 - Statement - Statements of Net Assets Available for Benefits link:presentationLink link:calculationLink link:definitionLink 75020 - Statement - Statement of Changes in Net Assets Available for Benefits link:presentationLink link:calculationLink link:definitionLink 75030 - Disclosure - Description of the Plan link:presentationLink link:calculationLink link:definitionLink 75040 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 75050 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 75060 - Disclosure - Contracts with Insurance Companies link:presentationLink link:calculationLink link:definitionLink 75070 - Disclosure - Party-in-Interest Transactions link:presentationLink link:calculationLink link:definitionLink 75080 - Disclosure - Delinquent Participant Contributions link:presentationLink link:calculationLink link:definitionLink 75090 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 75100 - Disclosure - Schedule G, Part III - Nonexempt Transactions link:presentationLink link:calculationLink link:definitionLink 75110 - Disclosure - Schedule H, Line 4(a) - Schedule of Delinquent Participant Contributions link:presentationLink link:calculationLink link:definitionLink 75120 - Disclosure - Schedule of Assets (Held at End of Year) link:presentationLink link:calculationLink link:definitionLink 75130 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 75140 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 75150 - Disclosure - Schedule G, Part III - Nonexempt Transactions (Tables) link:presentationLink link:calculationLink link:definitionLink 75160 - Disclosure - Schedule H, Line 4(a) - Schedule of Delinquent Participant Contributions (Tables) link:presentationLink link:calculationLink link:definitionLink 75170 - Schedule - Schedule of Assets (Held at End of Year) (Tables) link:presentationLink link:calculationLink link:definitionLink 75180 - Disclosure - Description of the Plan (Additional Information) (Details) link:presentationLink link:calculationLink link:definitionLink 75190 - Disclosure - Fair Value Measurements (Schedule of Investments Measured at Fair Value on a Recurring Basis) (Details) link:presentationLink link:calculationLink link:definitionLink 75200 - Disclosure - Contracts with Insurance Companies (Additional Information) (Details) link:presentationLink link:calculationLink link:definitionLink 75210 - Disclosure - Party-in-Interest Transactions (Additional Information) (Details) link:presentationLink link:calculationLink link:definitionLink 75220 - Disclosure - Delinquent Participant Contributions (Additional Information) (Details) link:presentationLink link:calculationLink link:definitionLink 75230 - Disclosure - Subsequent Events (Additional Information) (Details) link:presentationLink link:calculationLink link:definitionLink 75240 - Disclosure - Schedule G, Part III - Nonexempt Transactions (Schedule of Nonexempt Transactions) (Details) link:presentationLink link:calculationLink link:definitionLink 75250 - Disclosure - Schedule H, Line 4(a) - Schedule of Delinquent Participant Contributions (Details) link:presentationLink link:calculationLink link:definitionLink 75260 - Schedule - Schedule of Assets (Held at End of Year) (Details) link:presentationLink link:calculationLink link:definitionLink 75260 - Schedule - Schedule of Assets (Held at End of Year) (Details) [Default] link:presentationLink link:calculationLink link:definitionLink EBP, Income Tax [Policy Text Block] Employee Benefit Plan Income Tax Policy Text Block. Income Tax Status EBP, Change in Net Asset Available for Benefit, Increase [Abstract] Additions EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Benefits paid to participants Current value of asset Employee Benefit Plan, Nonexempt Transactions, Current Value of Asset EBP, nonexempt transactions, current value of asset. EBP, Trustee [Member] EBP Trustee EBP, Receivable [Abstract] Receivables: Fair Value, Inputs, Level 2 [Member] Level 2 EBP, Related Party and Party-in-Interest Transactions [Line Items] Document Fiscal Period Focus EBP, Employer Contribution, Receivable Employer contributions Forfeited balances used to reduce matching contribution obligations EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Employee benefit plan employer contribution matching amount for semi monthly associates Employee benefit plan employer contribution matching amount for semi monthly associates. Employee Benefit Plan Stock Split Employee benefit plan stock split. Stock split EBP, Forfeited Nonvested Account Unallocated forfeitures EBP, Description of Plan [Text Block] Description of the Plan Employee Benefit Plan, Nonexempt Transactions, Net Gain (loss) on Transaction EBP, nonexempt transactions, net gain (loss) on each transaction. Net gain or (loss) on each transaction EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Interest income from notes receivable from participants Investment, Identifier [Axis] EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Administrative expenses EBP, Description of Plan [Line Items] EBP, Employer Contribution, Matching Percentage EBP, employer contribution, matching percentage Employee benefit plan participant contribution annual increase in automatic deferral rate Employee benefit plan participant contribution annual increase in automatic deferral rate Annual increase in automatic deferral rate, percentage EBP, Investment, Issuer Name [Extensible Enumeration] Employee Benefit Plan, Contracts with Insurance Companies [Abstract] EBP, Contracts with Insurance Companies. EBP, Investment, Fair Value and NAV [Abstract] EBP 001 [Member] EBP 001. EBP 001 EBP, Accounting Policy [Line Items] Equity Securities [Member] EBP, Schedule of Asset Held for Investment [Table] EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Participants maximum borrowing amount Amendment Flag EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash, Total Employer Deductions EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] EBP, restorative payments for lost earnings Employee Benefit Plan Restorative Payments for Lost Earnings Employee benefit plan restorative payments for lost earnings. EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Participants minimum borrowing amount EBP, Payment to Participant [Policy Text Block] Payment of Benefits EBP, Schedule of Delinquent Participant Contribution [Line Items] Common Stock [Member] Common Stock Employee benefit plan employer contribution matching amount for commission paid associates Employee benefit plan employer contribution matching amount for commission paid associates EBP, Schedule of Asset Held for Investment [Line Items] Fair Value Hierarchy and NAV [Axis] EBP, Employer, Common Stock Fund [Member] Stifel Financial Corp. common stock EBP, Investment, Current Value, Type [Extensible Enumeration] Investment Type [Axis] Employee Benefit Plan, Schedule of Assets Held at End of Year [Text Block] Employee benefit plan, schedule of assets held at end of year. Schedule of Assets (Held at End of Year) Document Type Employee Benefit Plan, Contracts with Insurance Companies, Contract Value EBP, Contracts with insurance companies, contract value. Contract value Entity Central Index Key Self-directed brokerage accounts EBP, Self-Directed Brokerage Account [Member] Subsequent Event Type [Domain] Employee Benefit Plan, Schedule of Delinquent Participant Contribution [Text Block] Employee benefit plan, schedule of delinquent participant contribution. Delinquent Participant Contributions EBP, Investment [Policy Text Block] Valuation of Investments and Income Recognition Schedule G, Part III - Nonexempt Transactions Employee Benefit Plan, Schedule Of Nonexempt Transactions [Text Block] EBP, The entire disclosure for nonexempt transactions. EBP, Subsequent Event [Table] EBP, Accounting Policy [Table] EBP, Subsequent Event [Abstract] EBP, Basis of Accounting [Policy Text Block] Basis of Presentation Current Fiscal Year End Date Employee Benefit Plan, Contracts with Insurance Companies, Guaranteed Minimum Interest Rate EBP, contracts with insurance companies, guaranteed minimum interest rate. Guaranteed minimum interest rate Employee Benefit Plan, Contracts with Insurance Companies [Line Items] EBP, Contracts with Insurance Companies. EBP, Description of Plan [Table] EBP, Schedule of Delinquent Participant Contribution, Pending Correction in VFCP Contributions pending correction in VFCP Employee benefit plan participant contribution aftertax maximum annual compensation to total compensation percentage Employee benefit plan participant contribution aftertax maximum annual compensation to total compensation percentage. After-tax contribution percentage Subsequent Event [Member] Subsequent Event EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment, Total Interest and dividends Employee Benefit Plan Nonexempt Transactions [Table] EBP, Nonexempt Transactions. EBP, Noninterest-Bearing Cash Cash EBP, Investment, Number of Shares EBP, Number of shares Minimum [Member] Employee Benefit Plan Schedule of Delinquent Participant Contribution Total That Constitute Nonexempt Prohibitive Transactions Employee benefit plan schedule of delinquent participant contribution total that constitute nonexempt prohibitive transactions. Total that constitute nonexempt prohibitive transactions EBP, Related Party and Party-in-Interest Transactions [Text Block] Party-in-Interest Transactions EBP, Change in Net Asset Available for Benefit, Increase Total additions Total additions Fair Value, Inputs, Level 3 [Member] Level 3 EBP, Change in Net Asset Available for Benefit, Increase from Contribution Total contributions EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Schedule of Delinquent Participant Contribution, Transferred Late to Plan EBP, Schedule of Delinquent Participant Contribution, Transferred Late to Plan Participant contributions transferred late to the plan Employee Benefit Plan, Contracts with Insurance Companies, Average Interest Earned EBP, contracts with insurance companies, the average interest earned by the plan. Average interest earned by the Plan Document Information [Line Items] Fair Value Measured at Net Asset Value Per Share Fair Value Measured at Net Asset Value Per Share [Member] EBP, Statement of Net Asset Available for Benefit [Abstract] EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Participants Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Level 1 2 and 3 EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Contributions: EBP, Participant Contribution, Automatic, Deferral Rate Automatic deferral rate EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value, Ending Balance EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value, Beginning Balance EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value, Total Investments at fair value EBP, Use of Estimate [Policy Text Block] Use of Estimates Mutual funds Mutual Fund [Member] Entity [Domain] Employee benefit plan, maximum annual catch up contribution amount Employee benefit plan, maximum annual catch up contribution amount. EBP, Summary of Accounting Policy [Text Block] Summary of Significant Accounting Policies Employee benefit plan eligible earnings for employer contribution for commission paid associates Employee benefit plan eligible earnings for employer contribution for commission paid associates. EBP, Pooled Separate Account [Member] Pooled separate accounts measured at NAV Fair Value Measurements EBP, Investment, Fair Value and NAV [Text Block] EBP, Description of Plan and Accounting Change [Abstract] EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Participant loans EBP, Statement of Change in Net Asset Available for Benefit [Line Items] Statistical Measurement [Domain] EBP, Note Receivable from Participant Notes receivable from participants Document Period End Date Fair Value Hierarchy and NAV [Domain] Risks and Uncertainties EBP, Risk and Uncertainty [Policy Text Block] EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage Notes receivable from participants, account, maximum borrowing, to total account, percentage EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Subsequent Event [Text Block] Subsequent Events EBP, Schedule of Delinquent Participant Contribution, Corrected Total fully corrected under VFCP and prohibited transaction exemption 2002-51 EBP, Participant Contribution, Pretax, Maximum Annual Compensation, Amount Maximum annual participant contribution amount Cover [Abstract] Investments [Domain] EBP, Net Asset Available for Benefit Net assets available for benefits Net assets available for benefits at end of year Net assets available for benefits at beginning of year Assets transferred EBP, Investment, Fair Value and NAV [Table Text Block] Schedule of Investments Measured at Fair Value on a Recurring Basis EBP, Schedule of Asset Held for Investment [Abstract] Employee Benefit Plans Termination Vested Percentage Employee benefit plans termination vested percentage. Termination vested percentage Contracts with Insurance Companies Employee Benefit Plan, Contracts with Insurance Companies [Text Block] The entire disclosure for contracts with insurance companies. EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Current Value EBP, Schedule of Asset Held for Investment [Table Text Block] Schedule of Assets (Held at End of Year) Number of shares purchased EBP, Investment, Purchased, Number of Shares EBP, Statement of Net Asset Available for Benefit [Table] Document Fiscal Year Focus EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment, Total Net appreciation in fair value of investments EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, employer contribution, participant compensation matched, percentage EBP, Statement of Change in Net Asset Available for Benefit [Table] Employee benefit plan eligible earnings for employer contribution for semi monthly associates Employee benefit plan eligible earnings for employer contribution for semi monthly associates. Employee Benefit Plan, Contracts with Insurance Companies, Contract Period EBP, contracts with insurance companies, contract period. Contract period Employee Benefit Plan, Nonexempt Transactions, Expenses Improperly Paid for Record Keeping Services EBP, nonexempt transactions, expenses improperly paid for record keeping services. Expenses improperly paid for record keeping services EBP, Schedule of Delinquent Participant Contribution [Abstract] EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage Maximum annual participant contribution percentage EBP, Plan Number EBP, Investment, Fair Value and NAV [Line Items] Document Information [Table] Legal Entity [Axis] EBP, Plan Name EBP, Plan Name EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment Net investment income Subsequent Event Type [Axis] EBP, Investment, Fair Value and NAV [Table] Rollovers EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] EBP, Asset Held for Investment EBP, Total EBP, Subsequent Event [Line Items] EBP, Schedule of Delinquent Participant Contribution, Not Corrected Contributions not yet corrected Maximum [Member] Maximum Statistical Measurement [Axis] EBP, Statement of Change in Net Asset Available for Benefit [Abstract] EBP, Schedule of Delinquent Participant Contribution, Corrected Outside VFCP Contributions corrected outside VFCP Employee Benefit Plan Schedule of Delinquent Participant Contributions Year [Text Block] Employee benefit plan schedule of delinquent participant contributions year. Schedule H, Line 4(a) - Schedule of Delinquent Participant Contributions Schedule of Nonexempt Transactions Employee Benefit Plan, Schedule of Nonexempt Transactions [Table Text Block] Tabular disclosure of nonexempt transactions. Entity Registrant Name EBP, Receivable Total receivables EBP, Asset Held for Investment, Participant Loan, Interest Rate Participant loans, interest rate Employee Benefit Plan Percentage of Stock Dividend Declared Employee benefit plan percentage of stock dividend declared. Percentage of stock dividend declared Employee Benefit Plan Nonexempt Transactions [Abstract] Employee Benefit Plan Nonexempt Transactions. EBP, Schedule of Delinquent Participant Contribution [Table Text Block] Schedule H, Line 4(a) - Schedule of Delinquent Participant Contributions EBP, Related Party and Party-in-Interest [Domain] EBP, Related Party and Party-in-Interest [Axis] After-tax contribution amount Employee Benefit Plan Participant Contribution Aftertax Maximum Annual Compensation Amount Amount of maximum aftertax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), is permitted to contribute. Employee Benefit Plan, Nonexempt Transactions [Line Items] EBP, Nonexempt Transactions. EBP, Change in Net Asset Available for Benefit, Decrease Total deductions Employee Benefit Plan, Contracts with Insurance Companies [Table] EBP, Contracts with Insurance Companies. EBP, Schedule of Delinquent Participant Contribution [Table] Employee benefit plan, maximum annual catch up contribution amount for paticipants between age sixty and sixty three Employee benefit plan, maximum annual catch up contribution amount for paticipants between age sixty and sixty three. Employee benefit plan, maximum annual catch up contribution amount for paticipants between age 60 and 63 Level 1 Fair Value, Inputs, Level 1 [Member] EBP, Schedule of Delinquent Participant Contribution, Late Repayment Included [true false] Entity Tax Identification Number Participant loans, maturity date EBP, Asset Held for Investment, Participant Loan, Maturity Date Employee benefit plan, vesting percentage Employee benefit plan, vesting percentage. EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Net increase EBP, Investment, Excluding Plan Interest in Master Trust, Contract Value Investments, at contract value Employee benefit plan participant contribution withheld percentage Employee benefit plan participant contribution withheld percentage. EBP, Asset Held for Investment, Party-in-Interest [true false] Capital Group Euro Pacific Growth Fund [Member] American Century Fund. EBP, Self-Directed Brokerage Accounts. Silvercrest Asset Management Fund [Member] American Funds The Bond Fund of America - R6. Stifel Financial Corp. Common Stock [Member] Artisan Partners Fund. Vanguard Total Intl Stock Index Institutional. American Funds Investment Company of America - R6. Wellington [Member] American Funds The Bond Fund of America - R6 [Member] Stifel Financial Corp. common stock. Silvercrest asset management fund. Vanguard Small-Cap Index Fund Institutional Shares [Member] Times Square Fund [Member] American Funds The Growth Fund of America - R6 [Member] Self-directed brokerage accounts. Vanguard Total Intl Stock Index Institutional [Member] Self-directed Brokerage Accounts [Member] American Century Fund [Member] American Funds The Growth Fund of America - R6. Empower guaranteed income fund. Vanguard Total Bond Market Index Fund [Member] LSV asset management fund. Vanguard Small-Cap Index Fund Institutional Shares. Vanguard Mid-Cap Index Fund Institutional Shares. Day One Income Flex Target Balanced Fund [Member] Wellington. Invesco Developing Markets Fund - R6. Invesco Developing Markets Fund - R6 [Member] Day one income flex target balanced fund. Fidelity Contrafund - K6 [Member] Vanguard Mid-Cap Index Fund Institutional Shares [Member] Vanguard Total Bond Market Index Fund. Artisan Partners Fund [Member] PIMCO Fund [Member] LSV Asset Management Fund [Member] American Funds Investment Company of America - R6 [Member] PIMCO fund. Capital group euro pacific growth fund. Vanguard Institutional Index Fund [Member] Fidelity Contrafund - K6. PGIM Fund [Member] PGIM Real Assets Fund - R6 [Member] EBP, Self-Directed Brokerage Accounts [Member] PGIM Real Assets Fund - R6. Times square fund. Vanguard Institutional Index Fund. PGIM fund. Empower Guaranteed Income Fund [Member]