Derivative Instruments - Effect on Income Statement (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency loss, inclusive of the impact of derivatives	$ (2,808)	$ (5,675)	$ (2,222)
Foreign Exchange Contract [Member] | Other Comprehensive Income (Loss) [Member] | Cash Flow Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Recognized in AOCI (effective portion)	(1,934)	8,032	108
Foreign Exchange Contract [Member] | Sales Revenue, Net [Member] | Cash Flow Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Reclassified from AOCI into cost of sales (effective portion)	33	0	0
Foreign Exchange Contract [Member] | Cost of Sales [Member] | Cash Flow Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Reclassified from AOCI into cost of sales (effective portion)	(790)	(2,511)	3,558
Foreign Exchange Contract [Member] | Other Income Expense Net [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Recognized in other, net	(4,802)	(4,882)	(6,181)
Foreign Exchange Contract [Member] | Other Income Expense Net [Member] | Cash Flow Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Recognized in other, net (ineffective portion and amount excluded from effectiveness testing)	$ (80)	$ 9	$ 83