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Forward and Option Purchase Contracts Outstanding (Detail) (Foreign Exchange Forward)	3 Months Ended
	Mar. 31, 2012 Currency, British Pound Sterling Derivative Instrument 1 GBP (£)	Mar. 31, 2012 Currency, British Pound Sterling Derivative Instrument 2 GBP (£)	Mar. 31, 2012 Currency, British Pound Sterling Derivative Instrument 3 GBP (£)	Mar. 31, 2012 Currency, Canadian Dollar CAD	Mar. 31, 2012 Currency, Euro EUR (€)	Mar. 31, 2012 Currency, Euro Derivative Instrument 1 EUR (€)	Mar. 31, 2012 Currency, Euro Derivative Instrument 2 EUR (€)	Mar. 31, 2012 Currency, Mexican Peso MXN	Mar. 31, 2012 Currency, U.S. Dollar Derivative Instrument 1 USD ($)	Mar. 31, 2012 Currency, U.S. Dollar Derivative Instrument 2 USD ($)	Mar. 31, 2012 Currency, U.S. Dollar Derivative Instrument 3 USD ($)	Mar. 31, 2012 Currency, U.S. Dollar Derivative Instrument 4 USD ($)
Derivative [Line Items]
Forward contracts to purchase						€ 14,188,000	€ 11,823,000		$ 2,376,000	$ 4,006,000	$ 48,505,000	$ 1,549,000
Forward contracts to sell	£ 12,000,000	£ 10,000,000	£ 1,500,000	4,000,000	€ 36,500,000			20,000,000
Maturity	Apr. 05, 2012	Apr. 05, 2012	Jun. 29, 2012	Jun. 29, 2012	Jun. 29, 2012	Apr. 05, 2012	Apr. 05, 2012	Jun. 29, 2012	Jun. 29, 2012	Jun. 29, 2012	Jun. 29, 2012	Jun. 29, 2012

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The date the derivative matures.

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No definition available.

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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

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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

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