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Regulatory Capital Requirements (Schedule Of Total Risk-Based, Tier 1 Risk-Based, And Tier 1 Leverage Ratios) (Details) $ in Thousands | Sep. 30, 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 | $ 2,732,654
Tier 1 capital, Actual Ratio | 0.192
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 853,616
Tier 1 capital For Capital Adequacy Purposes, Ratio | 6.0
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,138,154
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 8.0
Total capital, Actual Amount | $ 2,888,681
Total capital, Actual Ratio | 0.203
Total capital For Capital Adequacy Purposes, Amount | $ 1,138,154
Total capital For Capital Adequacy Purposes, Ratio | 8.0
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,422,693
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 10.0
Tier 1 leverage, Actual Amount | $ 2,732,654
Tier 1 leverage, Actual Ratio | 0.113
Tier 1 leverage For Capital Adequacy Purposes, Amount | $ 971,609
Tier 1 leverage For Capital Adequacy Purposes, Ratio | 4.0
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,214,512
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 5.0
Stifel Financial Corp. [Member] | Common Stock [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 2,197,654
Tier 1 capital, Actual Ratio | 0.154
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 640,212
Tier 1 capital For Capital Adequacy Purposes, Ratio | 4.5
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 924,750
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 6.5
Stifel Bank & Trust [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 1,034,480
Tier 1 capital, Actual Ratio | 0.117
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 529,707
Tier 1 capital For Capital Adequacy Purposes, Ratio | 6.0
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 706,276
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 8.0
Total capital, Actual Amount | $ 1,144,843
Total capital, Actual Ratio | 0.130
Total capital For Capital Adequacy Purposes, Amount | $ 706,276
Total capital For Capital Adequacy Purposes, Ratio | 8.0
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 882,845
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 10.0
Tier 1 leverage, Actual Amount | $ 1,034,480
Tier 1 leverage, Actual Ratio | 0.072
Tier 1 leverage For Capital Adequacy Purposes, Amount | $ 578,347
Tier 1 leverage For Capital Adequacy Purposes, Ratio | 4.0
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 722,934
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 5.0
Stifel Bank & Trust [Member] | Common Stock [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 1,034,480
Tier 1 capital, Actual Ratio | 0.117
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 397,280
Tier 1 capital For Capital Adequacy Purposes, Ratio | 4.5
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 573,849
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 6.5
Stifel Bank [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 201,106
Tier 1 capital, Actual Ratio | 0.180
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 67,021
Tier 1 capital For Capital Adequacy Purposes, Ratio | 6.0
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 89,361
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 8.0
Total capital, Actual Amount | $ 215,097
Total capital, Actual Ratio | 0.193
Total capital For Capital Adequacy Purposes, Amount | $ 89,361
Total capital For Capital Adequacy Purposes, Ratio | 8.0
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 111,701
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 10.0
Tier 1 leverage, Actual Amount | $ 201,106
Tier 1 leverage, Actual Ratio | 0.073
Tier 1 leverage For Capital Adequacy Purposes, Amount | $ 110,807
Tier 1 leverage For Capital Adequacy Purposes, Ratio | 4.0
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 138,508
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 5.0
Stifel Bank [Member] | Common Stock [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 201,106
Tier 1 capital, Actual Ratio | 0.180
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 50,266
Tier 1 capital For Capital Adequacy Purposes, Ratio | 4.5
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 72,606
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 6.5

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