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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, 2021 USD ($)
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Stifel Financial Corp. [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 3,501,734
Tier 1 capital, Actual Ratio | 0.206
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 1,019,591
Tier 1 capital For Capital Adequacy Purposes, Ratio | 6.0
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,359,454
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 8.0
Total capital, Actual Amount | $ 3,643,378
Total capital, Actual Ratio | 0.214
Total capital For Capital Adequacy Purposes, Amount | $ 1,359,454
Total capital For Capital Adequacy Purposes, Ratio | 8.0
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,699,318
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 10.0
Tier 1 leverage, Actual Amount | $ 3,501,734
Tier 1 leverage, Actual Ratio | 0.120
Tier 1 leverage For Capital Adequacy Purposes, Amount | $ 1,164,911
Tier 1 leverage For Capital Adequacy Purposes, Ratio | 4.0
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,456,139
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 | $ 2,816,734
Tier 1 capital, Actual Ratio | 0.166
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 764,693
Tier 1 capital For Capital Adequacy Purposes, Ratio | 4.5
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,104,557
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 | $ 1,145,805
Tier 1 capital, Actual Ratio | 0.107
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 643,629
Tier 1 capital For Capital Adequacy Purposes, Ratio | 6.0
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 858,172
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 8.0
Total capital, Actual Amount | $ 1,250,328
Total capital, Actual Ratio | 0.117
Total capital For Capital Adequacy Purposes, Amount | $ 858,172
Total capital For Capital Adequacy Purposes, Ratio | 8.0
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,072,715
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 10.0
Tier 1 leverage, Actual Amount | $ 1,145,805
Tier 1 leverage, Actual Ratio | 0.070
Tier 1 leverage For Capital Adequacy Purposes, Amount | $ 651,241
Tier 1 leverage For Capital Adequacy Purposes, Ratio | 4.0
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 814,051
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 | $ 1,145,805
Tier 1 capital, Actual Ratio | 0.107
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 482,722
Tier 1 capital For Capital Adequacy Purposes, Ratio | 4.5
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 697,264
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 | $ 309,150
Tier 1 capital, Actual Ratio | 0.209
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 88,843
Tier 1 capital For Capital Adequacy Purposes, Ratio | 6.0
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 118,457
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 8.0
Total capital, Actual Amount | $ 316,431
Total capital, Actual Ratio | 0.214
Total capital For Capital Adequacy Purposes, Amount | $ 118,457
Total capital For Capital Adequacy Purposes, Ratio | 8.0
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 148,071
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 10.0
Tier 1 leverage, Actual Amount | $ 309,150
Tier 1 leverage, Actual Ratio | 0.071
Tier 1 leverage For Capital Adequacy Purposes, Amount | $ 174,525
Tier 1 leverage For Capital Adequacy Purposes, Ratio | 4.0
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 218,157
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 | $ 309,150
Tier 1 capital, Actual Ratio | 0.209
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 66,632
Tier 1 capital For Capital Adequacy Purposes, Ratio | 4.5
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 96,246
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 6.5

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- Definition Amount of total capital as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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- Definition Amount of Tier 1 leverage capital as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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