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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, 2024 USD ($)
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Stifel Financial Corp. [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 4,159,276
Tier 1 capital, Actual Ratio | 0.179
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 1,390,994
Tier 1 capital For Capital Adequacy Purposes, Ratio | 0.060
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,854,659
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.080
Total capital, Actual Amount | $ 4,377,743
Total capital, Actual Ratio | 0.189
Total capital For Capital Adequacy Purposes, Amount | $ 1,854,659
Total capital For Capital Adequacy Purposes, Ratio | 0.080
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 2,318,324
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.100
Tier 1 leverage, Actual Amount | $ 4,159,276
Tier 1 leverage, Actual Ratio | 0.113
Tier 1 leverage For Capital Adequacy Purposes, Amount | $ 1,472,539
Tier 1 leverage For Capital Adequacy Purposes, Ratio | 0.040
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,840,674
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 | $ 3,474,276
Tier 1 capital, Actual Ratio | 0.15
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 1,043,246
Tier 1 capital For Capital Adequacy Purposes, Ratio | 0.045
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,506,911
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 | $ 1,306,476
Tier 1 capital, Actual Ratio | 0.107
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 732,800
Tier 1 capital For Capital Adequacy Purposes, Ratio | 0.060
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 977,066
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.080
Total capital, Actual Amount | $ 1,429,156
Total capital, Actual Ratio | 0.117
Total capital For Capital Adequacy Purposes, Amount | $ 977,066
Total capital For Capital Adequacy Purposes, Ratio | 0.080
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,221,333
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.100
Tier 1 leverage, Actual Amount | $ 1,306,476
Tier 1 leverage, Actual Ratio | 0.071
Tier 1 leverage For Capital Adequacy Purposes, Amount | $ 735,906
Tier 1 leverage For Capital Adequacy Purposes, Ratio | 0.040
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 919,883
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 | $ 1,306,476
Tier 1 capital, Actual Ratio | 0.107
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 549,600
Tier 1 capital For Capital Adequacy Purposes, Ratio | 0.045
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 793,866
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 | $ 758,397
Tier 1 capital, Actual Ratio | 0.136
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 335,487
Tier 1 capital For Capital Adequacy Purposes, Ratio | 0.060
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 447,315
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.080
Total capital, Actual Amount | $ 799,189
Total capital, Actual Ratio | 0.143
Total capital For Capital Adequacy Purposes, Amount | $ 447,315
Total capital For Capital Adequacy Purposes, Ratio | 0.080
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 559,144
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.100
Tier 1 leverage, Actual Amount | $ 758,397
Tier 1 leverage, Actual Ratio | 0.071
Tier 1 leverage For Capital Adequacy Purposes, Amount | $ 428,036
Tier 1 leverage For Capital Adequacy Purposes, Ratio | 0.040
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 535,045
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 | $ 758,397
Tier 1 capital, Actual Ratio | 0.136
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 251,615
Tier 1 capital For Capital Adequacy Purposes, Ratio | 0.045
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 363,444
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.065

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