XML 54 R47.htm IDEA: XBRL DOCUMENT
v3.25.3

Bank Deposits (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2025
Deposits Liabilities, Balance Sheet, Reported Amounts [Abstract] |
Schedule of Deposits | Deposits consist of interest-bearing demand deposits (primarily money market and savings accounts), non-interest bearing demand deposits, and certificates of deposit. Deposits at September 30, 2025 and December 31, 2024 were as follows (in thousands):
|  | September 30, 2025 |  |  | December 31, 2024 |
Demand deposits (interest-bearing) |  | $ | 29,277,379 |  |  | $ | 28,580,415 |
Demand deposits (non-interest-bearing) |  |  | 456,021 |  |  |  | 318,229 |
Certificates of deposit |  |  | 404,348 |  |  |  | 203,583 |
|  | $ | 30,137,748 |  |  | $ | 29,102,227 |

X
- Definition Schedule of deposits. + References No definition available. + Details
Name: | sf_ScheduleOfDepositsTableTextBlock
Namespace Prefix: | sf_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DepositsLiabilitiesBalanceSheetReportedAmountsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration