XML 146 R61.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Fair Value Measurements - Narrative (Details) - Jun. 03, 2016 CAD in Millions, $ in Millions | CAD | USD ($)
--- | --- | ---
JJE |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent earn-out payment | CAD 10.0 | $ 7.7

X
- Definition Acquisition contingent earn-out + References No definition available. + Details
Name: | fss_Acquisitioncontingentearnout
Namespace Prefix: | fss_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=fss_JoeJohnsonEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |