Hedging (Details) (USD $)	3 Months Ended		9 Months Ended								3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Foreign Exchange Forward [Member]	Dec. 31, 2011 Foreign Exchange Forward [Member]	Sep. 30, 2012 Foreign Exchange Forward [Member] Other Current Assets [Member]	Dec. 31, 2011 Foreign Exchange Forward [Member] Other Current Assets [Member]	Sep. 30, 2012 Foreign Exchange Forward [Member] Other Accrued Liabilities [Member]	Dec. 31, 2011 Foreign Exchange Forward [Member] Other Accrued Liabilities [Member]	Sep. 30, 2012 Cash Flow Hedging [Member] Foreign Exchange Forward [Member] Derivatives	Sep. 30, 2011 Cash Flow Hedging [Member] Foreign Exchange Forward [Member]	Sep. 30, 2012 Cash Flow Hedging [Member] Foreign Exchange Forward [Member] Derivatives	Sep. 30, 2011 Cash Flow Hedging [Member] Foreign Exchange Forward [Member] Derivatives
Derivatives, Fair Value [Line Items]
Maximum Length of Time Hedged in Cash Flow Hedge			2 years
Derivative, New Instruments During Period, Notional Amount											$ 3,300,000		$ 10,200,000	$ 2,200,000
Derivative, Number of New Instruments During Period											21		62	12
Notional Amount of Foreign Currency Cash Flow Hedge Derivatives					14,215,000	15,480,000
Cash Flow Hedge Derivative Instrument Assets at Fair Value							10,000	0
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value									(281,000)	(647,000)
Hedge Loss Recognized in Other Comprehensive Income (Loss)	781,000	(660,000)	108,000	(603,000)							781,000	(660,000)	108,000	(603,000)
Cash Flow Hedge Gain (Loss) Reclassified to Cost of Sales, Net	123,000	18,000	191,000	53,000
Cash Flow Hedge Gain (Loss) Reclassified To Research and Development	70,000	109,000	116,000	339,000
Cash Flow Hedge Gain (Loss) Reclassified To Selling, General and Administrative	51,000	52,000	35,000	126,000
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months					$ (200,000)