XML 84 R71.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Restructuring Costs (Details) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2017 USD ($)
Restructuring and Related Activities [Abstract] |
Non-cash restructuring costs | $ 5,048
Asset impairment costs | 4,786
Accelerated depreciation costs | 262
Workforce reduction costs incurred | 215
Workforce reduction costs paid | $ 15

X
- Definition Restructuring Costs, Accelerated Depreciation + References No definition available. + Details
Name: | sif_RestructuringCostsAcceleratedDepreciation
Namespace Prefix: | sif_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Restructuring Costs, Asset Impairment + References No definition available. + Details
Name: | sif_RestructuringCostsAssetImpairment
Namespace Prefix: | sif_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Restructuring Costs, Workforce Reduction Costs Incurred + References No definition available. + Details
Name: | sif_RestructuringCostsWorkforceReductionCostsIncurred
Namespace Prefix: | sif_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Restructuring Costs, Workforce Reduction Costs Paid + References No definition available. + Details
Name: | sif_RestructuringCostsWorkforceReductionCostsPaid
Namespace Prefix: | sif_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
Name: | us-gaap_RestructuringCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration