Investment In Unconsolidated Subsidiary - Additional Information (Detail)	Sep. 30, 2012
Investment [Line Items]
Percentage of ownership in Joint Venture	40.00%
Safety Hi-Tech S.r.l
Investment [Line Items]
Percentage of ownership in Joint Venture	40.00%
Banini-Binotti Associates
Investment [Line Items]
Percentage of ownership in Joint Venture	20.00%