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Derivative Instruments and Hedging Activities (Details Textual)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended 9 Months Ended
Sep. 30, 2012
USD ($)
Sep. 30, 2011
USD ($)
Sep. 30, 2012
USD ($)
Sep. 30, 2011
USD ($)
Sep. 30, 2012
Designated as Hedging Instrument [Member]
USD ($)
Sep. 30, 2012
Designated as Hedging Instrument [Member]
CAD
Dec. 31, 2011
Designated as Hedging Instrument [Member]
USD ($)
Dec. 31, 2011
Designated as Hedging Instrument [Member]
CAD
Sep. 30, 2012
Designated as Hedging Instrument [Member]
Other contract [Member]
USD ($)
Sep. 30, 2012
Designated as Hedging Instrument [Member]
Other contract [Member]
CAD
Sep. 30, 2012
Not Designated as Hedging Instrument [Member]
USD ($)
Sep. 30, 2012
Not Designated as Hedging Instrument [Member]
CAD
Dec. 31, 2011
Not Designated as Hedging Instrument [Member]
USD ($)
Dec. 31, 2011
Not Designated as Hedging Instrument [Member]
CAD
Derivative Instruments and Hedging Activities (Textual) [Abstract]                            
Notional amount of Canadian forward contracts         $ 14.2 14.0 $ 8.5 8.6     $ 1.9 1.8 $ 1.5 1.5
Notional amount of Canadian forward contracts with maturity periods greater than 12 months                 4.8 4.7        
Maximum maturity period for Canadian forward contracts with maturity periods greater than 12 months         18 months 18 months                
Maturity period for Canadian forward contracts     12 months                      
Unrealized pretax loss on outstanding derivatives accumulated in other comprehensive loss expected to be reclassified within 12 months 0.3   0.3                      
Gains and Losses from derivative contracts not designated as hedging instruments recognized in net sales $ 0.3 $ 0.9 $ 0.4 $ 0.3