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Fair Value Measurement (Foreign Currency Forward Contracts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivative [Line Items]
Gains (losses) on intercompany receivables	$ (800)	$ (500)	$ (800)
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset, Fair Value, Gross Asset	2,935	6,211
Derivative Liability, Fair Value, Gross Liability	(1,064)	(1,032)
Fair value, assets (liabilities), net	1,871	5,179
Foreign Exchange Contracts [Member]
Derivative [Line Items]
Forward contracts not designated as hedging instruments net realized gains (losses)	400	(200)	(300)
Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset, Fair Value, Gross Asset	2,931	6,167
Derivative Liability, Fair Value, Gross Liability	(1,026)	(971)
Fair value, assets (liabilities), net	1,905	5,196
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
Notional amount of cash flow hedges	22,300
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contracts [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative Asset, Fair Value, Gross Asset	4	44
Derivative Liability, Fair Value, Gross Liability	(38)	(61)
Fair value, assets (liabilities), net	(34)	(17)
Cash Flow Hedging [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
Notional amount of cash flow hedges	105,500
Cash flow hedges realized gains (losses)	10,400	$ 600	$ 200
Unrealized gain (loss) on cash flow hedges in accumulated other comprehensive income (loss) expected to be recognized in next fiscal year	$ 1,200

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Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
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Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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