Hedging (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Maximum Length of Time Hedged in Cash Flow Hedge			2 years
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	$ 87,000	$ 445,000	$ 484,000	$ 801,000
Unrealized loss on hedge instruments	(723,000)	(1,646,000)	(723,000)	(1,646,000)	(268,000)	(875,000)	(1,413,000)	(765,000)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(542,000)	(678,000)	(332,000)	(1,682,000)
Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	87,000	445,000	484,000	801,000
Hedge Loss Recognized in Other Comprehensive Income (Loss)	(455,000)	(233,000)	152,000	(881,000)
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			(300,000)
Cost of Sales [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	25,000	169,000	138,000	347,000
Research and Development Expense [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	41,000	233,000	228,000	335,000
Selling, General and Administrative Expenses [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	21,000	43,000	118,000	119,000
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Cash Flow Hedge Derivative Instrument Assets at Fair Value	0		0			0
Other Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value						(169,000)
Foreign Exchange Forward [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Foreign Currency Cash Flow Hedge Derivatives	17,372,000		17,372,000			15,328,000
Foreign Exchange Forward [Member] | Other Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value	(13,000)		(13,000)
Foreign Exchange Forward [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative, Number of New Instruments During Period	18	21	18	33
Derivative, New Instruments During Period, Notional Amount	$ 11,600,000	$ 10,300,000	$ 11,600,000	$ 12,800,000