Hedging (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 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	$ 98,000	$ 178,000	$ 397,000	$ 356,000
Unrealized loss on hedge instruments	(268,000)	(1,413,000)	(268,000)	(1,413,000)	(360,000)	(875,000)	(657,000)	(765,000)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(6,000)	(934,000)	210,000	(1,004,000)
Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	98,000	178,000	397,000	356,000
Hedge Loss Recognized in Other Comprehensive Income (Loss)	92,000	(756,000)	607,000	(648,000)
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			(100,000)
Cost of Sales [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	27,000	89,000	113,000	178,000
Research and Development Expense [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	45,000	51,000	187,000	102,000
Selling, General and Administrative Expenses [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	26,000	38,000	97,000	76,000
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Cash Flow Hedge Derivative Instrument Assets at Fair Value	662,000		662,000			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	8,966,000		8,966,000			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	0		0
Foreign Exchange Forward [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative, Number of New Instruments During Period				12
Derivative, New Instruments During Period, Notional Amount				$ 2,500,000