Derivatives Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Foreign currency forward contracts
Derivative [Line Items]
Notional amount of derivatives, matured during period	$ 38,020,000	$ 42,890,000	$ 100,657,000	$ 118,017,000
Selling, General and Administrative Expenses | Foreign currency forward contracts
Derivative [Line Items]
Gain recognized in income	172,000		$ 113,000
Loss on derivative		(2,240,000)		(2,384,000)
Minimum
Derivative [Line Items]
Derivative, percentage of forcasted transactions with currency rate exposure			50.00%
Maximum
Derivative [Line Items]
Derivative, percentage of forcasted transactions with currency rate exposure			90.00%
Cash Flow Hedging [Member]
Derivative [Line Items]
Gain (Loss)	(116,000)	(53,000)	$ (1,070,000)	(585,000)
Cash Flow Hedging [Member] | Sales [Member]
Derivative [Line Items]
Loss on derivative	(1,087,000)	(369,000)	(1,865,000)	(517,000)
Cash Flow Hedging [Member] | Cost of Sales [Member]
Derivative [Line Items]
Gain recognized in income	$ 971,000	$ 316,000	$ 2,935,000
Loss on derivative				$ (68,000)