XML 78 R67.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Bank Loans (Recorded Balances Of Loans and Amount Of Allowance Allocated Based Upon Impairment Method by Portfolio Segment) (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016 | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Allowance for Loan Losses, Individually Evaluated for Impairment | $ 3,602 | $ 3,375 | $ 2,383 |
Allowance for Loan Losses, Collectively Evaluated for Impairment | 47,696 | 41,788 | 31,667 |
Allowance for Loan Losses, Total | 51,298 | 45,163 | 34,050 | $ 29,787
Recorded Investment in Loans, Individually Evaluated for Impairment | 28,036 | 26,934 | 23,002 |
Recorded Investment in Loans, Collectively Evaluated for Impairment | 5,895,588 | 5,610,631 | 3,482,507 |
Recorded Investment in Loans, Total | 5,923,624 | 5,637,565 | 3,505,509 |
Residential Real Estate [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Allowance for Loan Losses, Individually Evaluated for Impairment | 24 | 24 | 24 |
Allowance for Loan Losses, Collectively Evaluated for Impairment | 4,166 | 2,636 | 1,306 |
Allowance for Loan Losses, Total | 4,190 | 2,660 | 1,330 | 1,241
Recorded Investment in Loans, Individually Evaluated for Impairment | 176 | 178 | 704 |
Recorded Investment in Loans, Collectively Evaluated for Impairment | 2,214,180 | 2,161,222 | 729,979 |
Recorded Investment in Loans, Total | 2,214,356 | 2,161,400 | 730,683 |
Commercial And Industrial [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Allowance for Loan Losses, Individually Evaluated for Impairment | 2,453 | 2,392 | 1,215 |
Allowance for Loan Losses, Collectively Evaluated for Impairment | 36,336 | 32,735 | 26,485 |
Allowance for Loan Losses, Total | 38,789 | 35,127 | 27,700 | 24,748
Recorded Investment in Loans, Individually Evaluated for Impairment | 18,010 | 16,815 | 12,148 |
Recorded Investment in Loans, Collectively Evaluated for Impairment | 1,812,855 | 1,693,584 | 1,283,170 |
Recorded Investment in Loans, Total | 1,830,865 | 1,710,399 | 1,295,318 |
Securities-Based Loans [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Allowance for Loan Losses, Collectively Evaluated for Impairment | 3,393 | 3,094 | 1,605 |
Allowance for Loan Losses, Total | 3,393 | 3,094 | 1,605 | 1,607
Recorded Investment in Loans, Collectively Evaluated for Impairment | 1,728,516 | 1,614,033 | 1,345,719 |
Recorded Investment in Loans, Total | 1,728,516 | 1,614,033 | 1,345,719 |
Commercial Real Estate [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Allowance for Loan Losses, Individually Evaluated for Impairment | 972 | 722 | 981 |
Allowance for Loan Losses, Collectively Evaluated for Impairment | 646 | 641 | 308 |
Allowance for Loan Losses, Total | 1,618 | 1,363 | 1,289 | 264
Recorded Investment in Loans, Individually Evaluated for Impairment | 9,522 | 9,522 | 9,809 |
Recorded Investment in Loans, Collectively Evaluated for Impairment | 69,000 | 69,189 | 73,464 |
Recorded Investment in Loans, Total | 78,522 | 78,711 | 83,273 |
Consumer [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Allowance for Loan Losses, Individually Evaluated for Impairment | 5 | 6 | 14 |
Allowance for Loan Losses, Collectively Evaluated for Impairment | 102 | 123 | 70 |
Allowance for Loan Losses, Total | 107 | 129 | 84 | 105
Recorded Investment in Loans, Individually Evaluated for Impairment | 5 | 6 | 18 |
Recorded Investment in Loans, Collectively Evaluated for Impairment | 42,851 | 45,385 | 31,018 |
Recorded Investment in Loans, Total | 42,856 | 45,391 | 31,036 |
Home Equity Lines Of Credit [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Allowance for Loan Losses, Individually Evaluated for Impairment | 148 | 231 | 149 |
Allowance for Loan Losses, Collectively Evaluated for Impairment | 137 | 140 | 118 |
Allowance for Loan Losses, Total | 285 | 371 | 267 | 290
Recorded Investment in Loans, Individually Evaluated for Impairment | 323 | 413 | 323 |
Recorded Investment in Loans, Collectively Evaluated for Impairment | 14,255 | 14,595 | 12,188 |
Recorded Investment in Loans, Total | 14,578 | 15,008 | 12,511 |
Construction And Land [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Allowance for Loan Losses, Collectively Evaluated for Impairment | 437 | 232 | 118 |
Allowance for Loan Losses, Total | 437 | 232 | 118 | 78
Recorded Investment in Loans, Collectively Evaluated for Impairment | 13,931 | 12,623 | 6,969 |
Recorded Investment in Loans, Total | 13,931 | 12,623 | 6,969 |
Qualitative [Member] |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |
Allowance for Loan Losses, Collectively Evaluated for Impairment | 2,479 | 2,187 | 1,657 |
Allowance for Loan Losses, Total | $ 2,479 | $ 2,187 | $ 1,657 | $ 1,454

X
- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Namespace Prefix: | us-gaap_
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_FinancingReceivableAllowanceForCreditLossesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
Name: | us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65884687&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_FinancialInstrumentAxis=us-gaap_ResidentialMortgageMember
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=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=us-gaap_ConsumerLoanMember
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_ConstructionAndLandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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