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Derivative Instruments - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Derivative Instruments and Hedging Activities Disclosure [Abstract]      
Notional amounts of the forward contracts $ 122.0 $ 118.3  
Foreign exchange forward contracts, settlement, period 30 days    
Net loss (gain) from forward contracts, recorded in selling, general and administrative expense 0.5 (6.1) (0.5)
Net (liability) asset recorded in other current assets or accounts payable and accrued expenses $ 0.9 $ (0.8)