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Regulatory Capital Requirements (Schedule Of Total Risk-Based, Tier 1 Risk-Based, And Tier 1 Leverage Ratios) (Details) $ in Thousands | Dec. 31, 2020 USD ($)
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Stifel Financial Corp. [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 2,926,296
Tier 1 capital, Actual Ratio | 0.202
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 869,390
Tier 1 capital For Capital Adequacy Purposes, Ratio | 0.060
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,159,186
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.080
Total capital, Actual Amount | $ 3,080,234
Total capital, Actual Ratio | 0.213
Total capital For Capital Adequacy Purposes, Amount | $ 1,159,186
Total capital For Capital Adequacy Purposes, Ratio | 0.080
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,448,983
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.100
Tier 1 leverage, Actual Amount | $ 2,926,296
Tier 1 leverage, Actual Ratio | 0.119
Tier 1 leverage For Capital Adequacy Purposes, Amount | $ 984,215
Tier 1 leverage For Capital Adequacy Purposes, Ratio | 0.040
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,230,269
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.050
Stifel Financial Corp. [Member] | Common Stock [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 2,391,296
Tier 1 capital, Actual Ratio | 0.165
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 652,042
Tier 1 capital For Capital Adequacy Purposes, Ratio | 0.045
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 941,839
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.065
Stifel Bank & Trust [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 1,029,659
Tier 1 capital, Actual Ratio | 0.114
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 539,675
Tier 1 capital For Capital Adequacy Purposes, Ratio | 0.060
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 719,567
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.080
Total capital, Actual Amount | $ 1,142,093
Total capital, Actual Ratio | 0.127
Total capital For Capital Adequacy Purposes, Amount | $ 719,567
Total capital For Capital Adequacy Purposes, Ratio | 0.080
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 899,459
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.100
Tier 1 leverage, Actual Amount | $ 1,029,659
Tier 1 leverage, Actual Ratio | 0.071
Tier 1 leverage For Capital Adequacy Purposes, Amount | $ 576,387
Tier 1 leverage For Capital Adequacy Purposes, Ratio | 0.040
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 720,483
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.050
Stifel Bank & Trust [Member] | Common Stock [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 1,029,659
Tier 1 capital, Actual Ratio | 0.114
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 404,757
Tier 1 capital For Capital Adequacy Purposes, Ratio | 0.045
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 584,648
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.065
Stifel Bank [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 209,795
Tier 1 capital, Actual Ratio | 0.165
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 76,163
Tier 1 capital For Capital Adequacy Purposes, Ratio | 0.060
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 101,550
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.080
Total capital, Actual Amount | $ 224,281
Total capital, Actual Ratio | 0.177
Total capital For Capital Adequacy Purposes, Amount | $ 101,550
Total capital For Capital Adequacy Purposes, Ratio | 0.080
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 126,938
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.100
Tier 1 leverage, Actual Amount | $ 209,795
Tier 1 leverage, Actual Ratio | 0.073
Tier 1 leverage For Capital Adequacy Purposes, Amount | $ 114,655
Tier 1 leverage For Capital Adequacy Purposes, Ratio | 0.040
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 143,319
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.050
Stifel Bank [Member] | Common Stock [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 209,795
Tier 1 capital, Actual Ratio | 0.165
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 57,122
Tier 1 capital For Capital Adequacy Purposes, Ratio | 0.045
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 82,510
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.065

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