Note 11. Derivative Instruments (Detail) - Gains and Losses Related to Forward Contracts (USD $) In Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Sale Of Products [Member]
Gains And Losses Related To Forward Contracts	$ 5,994	$ (5,348)	$ 6,697	$ 1,003
Gain (Loss) On Derivatives Contracts [Member]
Gains And Losses Related To Forward Contracts	$ 40,382	$ (13,195)	$ 38,907	$ (11,196)

Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5618551-113959

Name:	us-gaap_GainLossOnDerivativeInstrumentsNetPretax
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration