XML 45 R32.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Business Information (Tables) | 12 Months Ended
--- | ---
Sep. 30, 2017
Segment Reporting [Abstract] |
Long-lived Assets by Geographic Areas |
|  | 2017 |  | 2016
Long-Lived Assets |  |  |  |
United States |  | $ | 33,114 |  |  | 44,108 |
Europe |  | 25,639 |  |  | 28,274 |
|  | $ | 58,753 |  |  | 72,382 |
Schedule of Maturities of Bargaining Agreements | The table below shows the expiration dates of the collective bargaining agreements.
Plant locations |  | Expiration date
Cleveland, Ohio |  | May 31, 2020
Alliance, Ohio * |  | October 26, 2017
Maniago, Italy |  | December 31, 2019
* Agreement ceased due to closure of Alliance facility.

X
- Definition Schedule of Maturities of Bargaining Agreements [Table Text Block] + References No definition available. + Details
Name: | sif_ScheduleofMaturitiesofBargainingAgreementsTableTextBlock
Namespace Prefix: | sif_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of long-lived assets, excluding financial instruments, long-term customer relationships of a financial institution, mortgage rights, deferred policy acquisition costs, and deferred tax assets, by geographic areas located in the entity's country of domicile and foreign countries in which the entity holds assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599 + Details
Name: | us-gaap_LongLivedAssetsByGeographicAreasTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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