Derivative Instruments and Hedging Activities - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Foreign currency contracts | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Derivative contract, maturity date	2012-12
Foreign currency contracts | Cash Flow Hedging | Currency, Canadian Dollar
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	$ 156,941,000
Unrealized gain (loss)	3,601,000
Foreign currency contracts | Cash Flow Hedging | Currency, Euro
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	22,948,000
Unrealized gain (loss)	(819,000)
Foreign currency contracts | Cash Flow Hedging | Currency, Swedish Krone
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	6,442,000
Unrealized gain (loss)	437,000
Foreign currency contracts | Cash Flow Hedging | Currency, Australian Dollar
Derivative Instruments, Gain (Loss) [Line Items]
Notional Amount	10,243,000
Unrealized gain (loss)	359,000
Commodity Contract | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Recognized gain (loss) in cost of sales on commodity contracts not designated as hedging instruments	$ (1,295,000)	$ 643,000