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 Measurement (Foreign Currency Forward Contracts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Gains (losses) on intercompany receivables	$ (653)	$ (804)	$ 1,058
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Asset Fair Value	2,367	5,836
Liabilities Fair Value	(1,853)	(648)
Net Fair Value	514	5,188
Foreign Exchange Forward [Member]
Derivative [Line Items]
Forward contracts not designated as hedging instruments net realized gains (losses)	(573)	69	$ (1,577)
Derivatives designated as hedging instruments: \| Foreign Exchange Forward [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Asset Fair Value	2,345
Liabilities Fair Value	(1,694)
Net Fair Value	651
Derivatives designated as hedging instruments: \| Foreign Exchange Forward [Member] \| Prepaids and other current assets
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Asset Fair Value	2,307	5,817
Liabilities Fair Value	(1,341)	(431)
Net Fair Value	966	5,386
Derivatives designated as hedging instruments: \| Foreign Exchange Forward [Member] \| Other Noncurrent Liabilities
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Asset Fair Value	38
Liabilities Fair Value	(353)
Net Fair Value	(315)
Not Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member]
Derivative [Line Items]
Derivative, Notional Amount	33,867	39,631
Not Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member] \| Other Current Liabilities [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Asset Fair Value	22	19
Liabilities Fair Value	(159)	(217)
Net Fair Value	$ (137)	(198)
Not Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member]
Derivative [Line Items]
Maximum Length of Time Hedged in Cash Flow Hedge	1 month
Cash Flow Hedging [Member] \| Foreign Exchange Forward [Member]
Derivative [Line Items]
Maximum Length of Time Hedged in Cash Flow Hedge	2 years
Derivative, Notional Amount	$ 156,818	$ 155,313
Unrealized gain (loss) on cash flow hedges in accumulated other comprehensive income (loss) expected to be recognized in next fiscal year	$ 700