XML 88 R77.htm IDEA: XBRL DOCUMENT
v3.20.2

Bank Loans (Aging Of The Recorded Investment In Past Due Loans) (Details) - USD ($) | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |
Total Past Due |  | $ 32,004,000 |  | $ 24,937,000 |
Current Balance |  | 10,542,293,000 |  | 9,727,679,000 |
Recorded Investment in Loans, Total |  | 10,574,297,000 |  | 9,752,616,000 |
Non-Accrual |  | 12,940,000 | [1] | 14,373,000 | [2]
Restructured |  | 161,000 | [1] | 163,000 | [2]
Nonperforming loans with no allowance | [1] | 1,249,000 |  |  |
Total | [1] | 14,350,000 |  |  |
Loans past due 90 days and still accruing interest |  | 0 |  | 0 |
Total | [2] |  |  | 14,536,000 |
30 - 89 Days Past Due [Member] |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |
Total Past Due |  | 17,815,000 |  | 10,564,000 |
90 or More Days Past Due [Member] |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |
Total Past Due |  | 14,189,000 |  | 14,373,000 |
Commercial And Industrial [Member] |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |
Total Past Due |  | 12,940,000 |  | 12,940,000 |
Current Balance |  | 4,136,367,000 |  | 3,426,013,000 |
Recorded Investment in Loans, Total |  | 4,149,307,000 |  | 3,438,953,000 |
Non-Accrual |  | 12,940,000 | [1] | 12,940,000 | [2]
Total | [1] | 12,940,000 |  |  |
Total | [2] |  |  | 12,940,000 |
Commercial And Industrial [Member] | 90 or More Days Past Due [Member] |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |
Total Past Due |  | 12,940,000 |  | 12,940,000 |
Residential Real Estate [Member] |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |
Total Past Due |  | 18,963,000 |  | 11,725,000 |
Current Balance |  | 3,691,694,000 |  | 3,297,823,000 |
Recorded Investment in Loans, Total |  | 3,710,657,000 |  | 3,309,548,000 |
Non-Accrual | [2] |  |  | 1,249,000 |
Restructured |  | 161,000 | [1] | 163,000 | [2]
Nonperforming loans with no allowance | [1] | 1,249,000 |  |  |
Total | [1] | 1,410,000 |  |  |
Total | [2] |  |  | 1,412,000 |
Residential Real Estate [Member] | 30 - 89 Days Past Due [Member] |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |
Total Past Due |  | 17,714,000 |  | 10,476,000 |
Residential Real Estate [Member] | 90 or More Days Past Due [Member] |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |
Total Past Due |  | 1,249,000 |  | 1,249,000 |
Securities-Based Loans [Member] |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |
Current Balance |  | 1,716,786,000 |  | 2,098,211,000 |
Recorded Investment in Loans, Total |  | 1,716,786,000 |  | 2,098,211,000 |
Commercial Real Estate [Member] |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |
Current Balance |  | 406,788,000 |  | 428,549,000 |
Recorded Investment in Loans, Total |  | 406,788,000 |  | 428,549,000 |
Construction And Land [Member] |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |
Current Balance |  | 472,216,000 |  | 398,839,000 |
Recorded Investment in Loans, Total |  | 472,216,000 |  | 398,839,000 |
Home Equity Lines Of Credit [Member] |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |
Total Past Due |  | 101,000 |  | 267,000 |
Current Balance |  | 62,598,000 |  | 50,938,000 |
Recorded Investment in Loans, Total |  | 62,699,000 |  | 51,205,000 |
Non-Accrual | [2] |  |  | 184,000 |
Total | [2] |  |  | 184,000 |
Home Equity Lines Of Credit [Member] | 30 - 89 Days Past Due [Member] |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |
Total Past Due |  | 101,000 |  | 83,000 |
Home Equity Lines Of Credit [Member] | 90 or More Days Past Due [Member] |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |
Total Past Due |  |  |  | 184,000 |
Other [Member] |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |
Total Past Due |  |  |  | 5,000 |
Current Balance |  | 55,844,000 |  | 27,306,000 |
Recorded Investment in Loans, Total |  | $ 55,844,000 |  | 27,311,000 |
Other [Member] | 30 - 89 Days Past Due [Member] |  |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |  |
Total Past Due |  |  |  | $ 5,000 |
[1] | There were no loans past due 90 days and still accruing interest at June 30, 2020.
[2] | There were no loans past due 90 days and still accruing interest at December 31, 2019.

X
- Definition Financing receivable recorded investment nonaccrual status and restructured loans. + References No definition available. + Details
Name: | sf_FinancingReceivableRecordedInvestmentNonaccrualStatusAndRestructuredLoans
Namespace Prefix: | sf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing receivable recorded investment nonaccrual status restructured loans and nonperforming loans with no allowance. + References No definition available. + Details
Name: | sf_FinancingReceivableRecordedInvestmentNonaccrualStatusRestructuredLoansAndNonperformingLoansWithNoAllowance
Namespace Prefix: | sf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing receivable recorded investment nonperforming loans with no allowance. + References No definition available. + Details
Name: | sf_FinancingReceivableRecordedInvestmentNonperformingLoansWithNoAllowance
Namespace Prefix: | sf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554 + Details
Name: | us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable 90 days or more past due and still accruing. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 16 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5111-111524 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable not past due. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953401-111524 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919253-210447 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable on nonaccrual status. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5111-111524 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 16 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable past due. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919253-210447 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_FinancingReceivableRecordedInvestmentPastDueLineItems
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_FinancingReceivablesPeriodPastDueAxis=sf_FinancingReceivables30To89DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
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: |