XML 87 R76.htm IDEA: XBRL DOCUMENT
v3.20.2

Bank Loans (Risk Category Of Loan Portfolio) (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | $ 10,753,688 | $ 9,752,616
Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 10,426,029 | 9,676,864
Special Mention [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 137,182 | 49,244
Substandard [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 176,288 | 13,568
Doubtful [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 14,189 | 12,940
Commercial And Industrial [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 4,080,939 | 3,438,953
Commercial And Industrial [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 3,791,192 | 3,365,800
Commercial And Industrial [Member] | Special Mention [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 120,663 | 48,241
Commercial And Industrial [Member] | Substandard [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 156,144 | 11,972
Commercial And Industrial [Member] | Doubtful [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 12,940 | 12,940
Residential Real Estate [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 3,804,836 | 3,309,548
Residential Real Estate [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 3,802,942 | 3,307,719
Residential Real Estate [Member] | Special Mention [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 645 | 417
Residential Real Estate [Member] | Substandard [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio |  | 1,412
Residential Real Estate [Member] | Doubtful [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 1,249 |
Securities-Based Loans [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 1,841,516 | 2,098,211
Securities-Based Loans [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 1,841,516 | 2,098,211
Commercial Real Estate [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 386,957 | 428,549
Commercial Real Estate [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 385,645 | 427,963
Commercial Real Estate [Member] | Special Mention [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 1,168 | 586
Commercial Real Estate [Member] | Substandard [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 144 |
Construction And Land [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 532,319 | 398,839
Construction And Land [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 498,079 | 398,839
Construction And Land [Member] | Special Mention [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 14,240 |
Construction And Land [Member] | Substandard [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 20,000 |
Home Equity Lines Of Credit [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 67,386 | 51,205
Home Equity Lines Of Credit [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 66,920 | 51,021
Home Equity Lines Of Credit [Member] | Special Mention [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 466 |
Home Equity Lines Of Credit [Member] | Substandard [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio |  | 184
Other [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | 39,735 | 27,311
Other [Member] | Pass [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Total risk category of loan portfolio | $ 39,735 | $ 27,311

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_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522 + Details
Name: | us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_DoubtfulMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=sf_CommercialAndIndustrialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=sf_SecuritiesBasedLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=sf_ConstructionAndLandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_HomeEquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=sf_OtherLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |