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Forward and Option Purchase Contracts Outstanding (Details) In Thousands, unless otherwise specified | 6 Months Ended
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Jun. 30, 2012 Currency, British Pound Sterling Derivative Instrument 1 GBP (£) | Jun. 30, 2012 Currency, British Pound Sterling Derivative Instrument 2 GBP (£) | Jun. 30, 2012 Currency, British Pound Sterling Derivative Instrument 3 GBP (£) | Jun. 30, 2012 Currency, Canadian Dollar CAD | Jun. 30, 2012 Currency, Euro EUR (€) | Jun. 30, 2012 Currency, Euro Derivative Instrument 1 EUR (€) | Jun. 30, 2012 Currency, Euro Derivative Instrument 2 EUR (€) | Jun. 30, 2012 Currency, Mexican Peso MXN | Jun. 30, 2012 Currency, U.S. Dollar Derivative Instrument 1 USD ($) | Jun. 30, 2012 Currency, U.S. Dollar Derivative Instrument 2 USD ($) | Jun. 30, 2012 Currency, U.S. Dollar Derivative Instrument 3 USD ($) | Jun. 30, 2012 Currency, U.S. Dollar Derivative Instrument 4 USD ($)
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Forward contracts to purchase |  |  |  |  |  | € 18,537,000 | € 12,461,000 |  | $ 4,641,000 | $ 3,860,000 | $ 37,290,000 | $ 1,452,000
Forward contracts to sell | £ 15,000,000 | £ 10,000,000 | £ 3,000,000 | 4,000,000 | € 30,000,000 |  |  | 20,000,000 |  |  |  |
Maturity | Sep. 28, 2012 | Sep. 28, 2012 | Sep. 28, 2012 | Sep. 28, 2012 | Sep. 28, 2012 | Sep. 28, 2012 | Sep. 28, 2012 | Sep. 28, 2012 | Sep. 28, 2012 | Sep. 28, 2012 | Sep. 28, 2012 | Sep. 28, 2012

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- Definition Aggregate notional amount of foreign currency derivatives to purchase a foreign currency. Notional amount refers to the number of currency units specified in the foreign currency derivative contract. + References 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 + Details
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- Definition Aggregate notional amount of foreign currency derivatives to sell a foreign currency. Notional amount refers to the number of currency units specified in the foreign currency derivative contract. + References 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 + Details
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