XML 98 R87.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Commitments, Guarantees, And Contingencies (Narrative) (Details) $ in Millions | Mar. 31, 2017 USD ($)
--- | ---
Loss Contingencies [Line Items] |
Outstanding committed capital to certain entities | $ 13.9
Business Development Corporations [Member] |
Loss Contingencies [Line Items] |
Outstanding committed capital to certain entities | $ 10.2

X
- Definition Outstanding committed capital to certain entities. + References No definition available. + Details
Name: | sf_OutstandingCommittedCapitalToCertainEntities
Namespace Prefix: | sf_
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_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=sf_BusinessDevelopmentCorporationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |