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Forward and Option Purchase Contracts Outstanding (Detail) (Foreign Exchange Forward) | 9 Months Ended
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Oct. 01, 2011 Currency, British Pound Sterling Derivative Instrument 1 GBP (£) | Oct. 01, 2011 Currency, British Pound Sterling Derivative Instrument 2 GBP (£) | Oct. 01, 2011 Currency, British Pound Sterling Derivative Instrument 3 GBP (£) | Oct. 01, 2011 Currency, Euro EUR (€) | Oct. 01, 2011 Currency, Euro Derivative Instrument 1 EUR (€) | Oct. 01, 2011 Currency, Euro Derivative Instrument 2 EUR (€) | Oct. 01, 2011 Currency, U.S. Dollar Derivative Instrument 3 USD ($) | Oct. 01, 2011 Currency, U.S. Dollar Derivative Instrument 4 USD ($)
Derivative [Line Items] |  |  |  |  |  |  |  |
Forward contracts to sell | £ 15,000,000 | £ 14,000,000 | £ 1,500,000 | € 3,000,000 |  |  |  |
Maturity Date | Oct. 04, 2011 | Oct. 04, 2011 | Dec. 30, 2011 | Dec. 30, 2011 | Oct. 04, 2011 | Oct. 04, 2011 | Dec. 30, 2011 | Dec. 30, 2011
Forward contracts to purchase |  |  |  |  | € 17,172,000 | € 16,037,000 | $ 4,270,000 | $ 2,376,000

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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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