XML 71 R60.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Available-For-Sale And Held-To-Maturity Securities (Schedule Of Amortized Cost And Fair Values Of The Available For Sale Securities And Held To Maturity Securities) (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available-for-sale Securities, Amortized cost |  | $ 3,451,901 | $ 3,190,090
Available for sale securities, unrealized gains | [1] | 16,385 | 11,634
Available-for-sale Securities, Gross unrealized losses | [1] | (12,913) | (20,411)
Available-for-sale securities |  | 3,455,373 | 3,181,313
Held-to-maturity Securities, Amortized cost | [2] | 3,307,970 | 3,038,405
Held-to-maturity Securities, Gross unrealized gains | [2] | 30,447 | 22,595
Held-to-maturity Securities, Gross unrealized losses | [2] | (16,537) | (20,446)
Held-to-maturity securities, Estimated fair value | [2] | 3,321,880 | 3,040,554
U.S. Government Agency Securities [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available-for-sale Securities, Amortized cost |  | 4,584 | 4,213
Available for sale securities, unrealized gains | [1] |  | 2
Available-for-sale Securities, Gross unrealized losses | [1] | (19) | (18)
Available-for-sale securities |  | 4,565 | 4,197
State And Municipal Securities [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available-for-sale Securities, Amortized cost |  | 75,685 | 76,066
Available for sale securities, unrealized gains | [1] | 2 |
Available-for-sale Securities, Gross unrealized losses | [1] | (3,305) | (3,576)
Available-for-sale securities |  | 72,382 | 72,490
Corporate Fixed Income Securities [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available-for-sale Securities, Amortized cost |  | 971,867 | 830,695
Available for sale securities, unrealized gains | [1] | 2,843 | 1,418
Available-for-sale Securities, Gross unrealized losses | [1] | (3,579) | (8,602)
Available-for-sale securities |  | 971,131 | 823,511
Held-to-maturity Securities, Amortized cost | [2] | 40,045 | 40,078
Held-to-maturity Securities, Gross unrealized gains | [2] | 69 | 30
Held-to-maturity securities, Estimated fair value | [2] | 40,114 | 40,108
Asset-Backed Securities [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available-for-sale Securities, Amortized cost |  | 2,000,561 | 1,858,929
Available for sale securities, unrealized gains | [1] | 13,367 | 9,857
Available-for-sale Securities, Gross unrealized losses | [1] |  | (1,068)
Available-for-sale securities |  | 2,013,928 | 1,867,718
Held-to-maturity Securities, Amortized cost | [2] | 1,754,093 | 1,370,300
Held-to-maturity Securities, Gross unrealized gains | [2] | 11,405 | 6,242
Held-to-maturity Securities, Gross unrealized losses | [2] | (2,063) | (3,396)
Held-to-maturity securities, Estimated fair value | [2] | 1,763,435 | 1,373,146
Mortgage Backed Securities [Member] | Agency [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available-for-sale Securities, Amortized cost |  | 321,352 | 340,738
Available for sale securities, unrealized gains | [1] | 131 | 298
Available-for-sale Securities, Gross unrealized losses | [1] | (2,421) | (2,304)
Available-for-sale securities |  | 319,062 | 338,732
Held-to-maturity Securities, Amortized cost | [2] | 1,454,314 | 1,567,758
Held-to-maturity Securities, Gross unrealized gains | [2] | 16,885 | 14,537
Held-to-maturity Securities, Gross unrealized losses | [2] | (14,474) | (17,037)
Held-to-maturity securities, Estimated fair value | [2] | 1,456,725 | 1,565,258
Mortgage Backed Securities [Member] | Commercial [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available-for-sale Securities, Amortized cost |  | 76,131 | 77,417
Available for sale securities, unrealized gains | [1] | 42 | 59
Available-for-sale Securities, Gross unrealized losses | [1] | (3,485) | (4,703)
Available-for-sale securities |  | 72,688 | 72,773
Held-to-maturity Securities, Amortized cost | [2] | 59,518 | 59,581
Held-to-maturity Securities, Gross unrealized gains | [2] | 2,088 | 1,786
Held-to-maturity securities, Estimated fair value | [2] | 61,606 | 61,367
Mortgage Backed Securities [Member] | Non-Agency [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available-for-sale Securities, Amortized cost |  | 1,721 | 2,032
Available-for-sale Securities, Gross unrealized losses | [1] | (104) | (140)
Available-for-sale securities |  | $ 1,617 | 1,892
Held-to-maturity Securities, Amortized cost | [2] |  | 688
Held-to-maturity Securities, Gross unrealized losses | [2] |  | (13)
Held-to-maturity securities, Estimated fair value | [2] |  | $ 675
[1] | Unrealized gains/(losses) related to available-for-sale securities are reported in accumulated other comprehensive loss.
[2] | Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements.

X
- Definition Available for sale securities, unrealized gains. + References No definition available. + Details
Name: | sf_AvailableForSaleSecuritiesUnrealizedGains
Namespace Prefix: | sf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Available for sale securities, unrealized loss. + References No definition available. + Details
Name: | sf_AvailableForSaleSecuritiesUnrealizedLoss
Namespace Prefix: | sf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Held to maturity securities, unrealized gains. + References No definition available. + Details
Name: | sf_HeldToMaturitySecuritiesUnrealizedGains
Namespace Prefix: | sf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Held to maturity securities, unrealized losses. + References No definition available. + Details
Name: | sf_HeldToMaturitySecuritiesUnrealizedLosses
Namespace Prefix: | sf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Schedule of available for sale and held to maturity securities. + References No definition available. + Details
Name: | sf_ScheduleOfAvailableForSaleAndHeldToMaturitySecuritiesLineItems
Namespace Prefix: | sf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562 + Details
Name: | us-gaap_AvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.6) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_HeldToMaturitySecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_FixedIncomeSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_MortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_AgencySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=sf_NonAgencyMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |