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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, 2023 USD ($)
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Stifel Financial Corp. [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 3,913,952
Tier 1 capital, Actual Ratio | 0.169
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 1,393,131
Tier 1 capital For Capital Adequacy Purposes, Ratio | 0.06
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,857,509
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.08
Total capital, Actual Amount | $ 4,136,017
Total capital, Actual Ratio | 0.178
Total capital For Capital Adequacy Purposes, Amount | $ 1,857,509
Total capital For Capital Adequacy Purposes, Ratio | 0.08
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 2,321,886
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.10
Tier 1 leverage, Actual Amount | $ 3,913,952
Tier 1 leverage, Actual Ratio | 0.108
Tier 1 leverage For Capital Adequacy Purposes, Amount | $ 1,454,233
Tier 1 leverage For Capital Adequacy Purposes, Ratio | 0.04
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,817,791
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.05
Stifel Financial Corp. [Member] | Common Stock [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 3,228,952
Tier 1 capital, Actual Ratio | 0.139
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 1,044,849
Tier 1 capital For Capital Adequacy Purposes, Ratio | 0.045
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,509,226
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 | $ 1,489,819
Tier 1 capital, Actual Ratio | 0.108
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 826,965
Tier 1 capital For Capital Adequacy Purposes, Ratio | 0.06
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,102,620
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.08
Total capital, Actual Amount | $ 1,625,012
Total capital, Actual Ratio | 0.118
Total capital For Capital Adequacy Purposes, Amount | $ 1,102,620
Total capital For Capital Adequacy Purposes, Ratio | 0.08
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,378,275
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.10
Tier 1 leverage, Actual Amount | $ 1,489,819
Tier 1 leverage, Actual Ratio | 0.077
Tier 1 leverage For Capital Adequacy Purposes, Amount | $ 774,198
Tier 1 leverage For Capital Adequacy Purposes, Ratio | 0.04
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 967,748
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.05
Stifel Bank & Trust [Member] | Common Stock [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 1,489,819
Tier 1 capital, Actual Ratio | 0.108
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 620,224
Tier 1 capital For Capital Adequacy Purposes, Ratio | 0.045
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 895,878
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 | $ 690,456
Tier 1 capital, Actual Ratio | 0.146
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 283,451
Tier 1 capital For Capital Adequacy Purposes, Ratio | 0.06
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 377,934
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.08
Total capital, Actual Amount | $ 722,840
Total capital, Actual Ratio | 0.153
Total capital For Capital Adequacy Purposes, Amount | $ 377,934
Total capital For Capital Adequacy Purposes, Ratio | 0.08
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 472,418
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.10
Tier 1 leverage, Actual Amount | $ 690,456
Tier 1 leverage, Actual Ratio | 0.071
Tier 1 leverage For Capital Adequacy Purposes, Amount | $ 390,341
Tier 1 leverage For Capital Adequacy Purposes, Ratio | 0.040
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 487,926
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.05
Stifel Bank [Member] | Common Stock [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 690,456
Tier 1 capital, Actual Ratio | 0.146
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 212,588
Tier 1 capital For Capital Adequacy Purposes, Ratio | 0.045
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 307,071
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.065

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