Discontinued Operations, Assets Held for Sale, and Business Divestiture Narrative (Details) (Repair group, USD $) In Thousands, unless otherwise specified	3 Months Ended
Dec. 31, 2013
Repair group
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Workforce reduction costs expected	$ 959
Workforce reduction costs incurred	274
Workforce reduction costs paid	$ 335

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

No definition available.

Name:	sif_SeveranceCosts1
Namespace Prefix:	sif_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration