XML 125 R110.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Regulatory Capital Requirements (Narrative) (Details) $ in Millions | Dec. 31, 2017 USD ($)
--- | ---
Stifel Financial Corp. [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Net capital under the alternative method | $ 1.0
Aggregate debit balances | 2.00%
Our Other Broker-Dealer Subsidiaries |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Ratio of indebtedness to net capital | 15
Stifel Nicolaus [Member] |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |
Aggregate debit balances | 18.60%
Net capital | $ 273.0
Excess of minimum required net capital | $ 243.6

X
- Definition Percentage of aggregate debit balances. + References No definition available. + Details
Name: | sf_PercentageOfAggregateDebitBalances
Namespace Prefix: | sf_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of net capital in excess of the alternative minimum required net capital. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
Name: | us-gaap_AlternativeExcessNetCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of net capital requirement computed under the alternative method allowed under regulatory reporting requirements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
Name: | us-gaap_AlternativeNetCapitalRequirement1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net capital is equal to the net worth of the broker dealer, less certain items such as exchange memberships, carrying value of securities not readily marketable, haircuts on marketable securities in proprietary accounts, furniture and equipment and other illiquid assets as defined. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
Name: | us-gaap_NetCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Indebtedness divided by net capital. + References No definition available. + Details
Name: | us-gaap_RatioOfIndebtednessToNetCapital1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ConsolidatedEntitiesAxis=us-gaap_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=sf_OurOtherBrokerDealerSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=sf_StifelNicolausMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |