Financial Instruments (Details 7) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Derivatives Fair Value [Line Items]
Derivative asset, Notional amount	$ 11,046	$ 41,513
Designated as Hedging Instrument [Member] \| Foreign Exchange Contract [Member]
Derivatives Fair Value [Line Items]
Derivative asset, Notional amount	4,062	12,671
Not Designated as Hedging Instrument [Member] \| Foreign Exchange Contract [Member]
Derivatives Fair Value [Line Items]
Derivative asset, Notional amount	$ 6,984	$ 28,842

Total monetary amount specified by the derivative asset(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Notional Amount
-URI http://asc.fasb.org/extlink&oid=6519104

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5579245-113959

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant