XML
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R114.htm
IDEA: XBRL DOCUMENT
v3.20.2
Subsequent Events (Details)
9 Months Ended
Sep. 30, 2020
Event
Subsequent Events [Abstract]
Number of types of subsequent events
2
X
- Definition
Number of types of subsequent events.
+ References
No definition available.
+ Details
Name:
sf_NumberOfTypesOfSubsequentEvents
Namespace Prefix:
sf_
Data Type:
xbrli:integerItemType
Balance Type:
na
Period Type:
duration
X
- References
No definition available.
+ Details
Name:
us-gaap_SubsequentEventsAbstract
Namespace Prefix:
us-gaap_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration