Derivative Financial Instruments (Details 1) (FOREX contracts [Member], USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Prepaid expenses and other current assets [Member]
Derivative Asset, Fair Value, Net [Abstract]
Derivative assets designated as hedging instruments, current	$ 8,410	$ 4,326
Accrued liabilities [Member]
Derivative Liability, Fair Value, Net [Abstract]
Derivative liabilities designated as hedging instruments, current	$ 0	$ (121)

Fair value of all liability derivatives designated as cash flow hedging instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624163-113959

Name:	us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant