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Regulatory Capital Requirements (Schedule Of Total Risk-Based, Tier 1 Risk-Based, And Tier 1 Leverage Ratios) (Details) $ in Thousands | Jun. 30, 2018 USD ($)
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Stifel Bank [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 1,111,891
Tier 1 capital, Actual Ratio | 14.40%
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 461,917
Tier 1 capital For Capital Adequacy Purposes, Ratio | 6.00%
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 615,890
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 8.00%
Total capital, Actual Amount | $ 1,185,666
Total capital, Actual Ratio | 15.40%
Total capital For Capital Adequacy Purposes, Amount | $ 615,890
Total capital For Capital Adequacy Purposes, Ratio | 8.00%
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 769,862
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 10.00%
Tier 1 leverage, Actual Amount | $ 1,111,891
Tier 1 leverage, Actual Ratio | 7.20%
Tier 1 leverage For Capital Adequacy Purposes, Amount | $ 620,834
Tier 1 leverage For Capital Adequacy Purposes, Ratio | 4.00%
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 776,042
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 5.00%
Common Stock [Member] | Stifel Bank [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 1,111,891
Tier 1 capital, Actual Ratio | 14.40%
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 346,438
Tier 1 capital For Capital Adequacy Purposes, Ratio | 4.50%
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 500,410
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 6.50%
Stifel Financial Corp. [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 1,977,651
Tier 1 capital, Actual Ratio | 18.40%
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 644,710
Tier 1 capital For Capital Adequacy Purposes, Ratio | 6.00%
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 859,614
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 8.00%
Total capital, Actual Amount | $ 2,051,426
Total capital, Actual Ratio | 19.10%
Total capital For Capital Adequacy Purposes, Amount | $ 859,614
Total capital For Capital Adequacy Purposes, Ratio | 8.00%
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,074,517
Total capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 10.00%
Tier 1 leverage, Actual Amount | $ 1,977,651
Tier 1 leverage, Actual Ratio | 9.50%
Tier 1 leverage For Capital Adequacy Purposes, Amount | $ 831,539
Tier 1 leverage For Capital Adequacy Purposes, Ratio | 4.00%
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,039,424
Tier 1 leverage To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 5.00%
Stifel Financial Corp. [Member] | Common Stock [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Tier 1 capital, Actual Amount | $ 1,762,240
Tier 1 capital, Actual Ratio | 16.40%
Tier 1 capital For Capital Adequacy Purposes, Amount | $ 483,533
Tier 1 capital For Capital Adequacy Purposes, Ratio | 4.50%
Tier 1 capital To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 698,436
Tier 1 To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 6.50%

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- Definition The minimum amount of Total Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
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- Definition The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
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- Definition The amount of Total Capital required to be categorized as well as capitalized under the regulatory framework for prompt corrective action. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
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- Definition The minimum amount of Tier 1 Leverage Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
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- Definition The minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 + Details
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