XML 102 R90.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Goodwill and Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Schedule of Goodwill and Intangible Assets [Line Items] |  |  |
Amortization of intangible assets | $ 20,929 | $ 19,595 | $ 18,188
Customer Relationships [Member] |  |  |
Schedule of Goodwill and Intangible Assets [Line Items] |  |  |
Weighted-average remaining lives of intangible assets | 9 years 7 months 6 days |  |
Trade Names [Member] |  |  |
Schedule of Goodwill and Intangible Assets [Line Items] |  |  |
Weighted-average remaining lives of intangible assets | 7 years 1 month 6 days |  |
Non-Compete Agreements [Member] |  |  |
Schedule of Goodwill and Intangible Assets [Line Items] |  |  |
Weighted-average remaining lives of intangible assets | 4 years 4 months 24 days |  |
Acquired Technology [Member] |  |  |
Schedule of Goodwill and Intangible Assets [Line Items] |  |  |
Weighted-average remaining lives of intangible assets | 2 years 7 months 6 days |  |
Core Deposits [Member] |  |  |
Schedule of Goodwill and Intangible Assets [Line Items] |  |  |
Weighted-average remaining lives of intangible assets | 1 year 2 months 12 days |  |
Investment Banking Backlog [Member] |  |  |
Schedule of Goodwill and Intangible Assets [Line Items] |  |  |
Weighted-average remaining lives of intangible assets | 4 years 8 months 12 days |  |

X
- Definition Schedule of goodwill and intangible assets. + References No definition available. + Details
Name: | sf_ScheduleOfGoodwillAndIntangibleAssetsLineItems
Namespace Prefix: | sf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482686/350-30-45-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
Name: | us-gaap_AmortizationOfIntangibleAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_NoncompeteAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=sf_AcquiredTechnologyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CoreDepositsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=sf_InvestmentBankingBacklogMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |