Contingencies and Other Information (Details) In Thousands, unless otherwise specified	12 Months Ended				12 Months Ended
Mar. 31, 2012 Pending or Threatened Litigation [Member] USD ($)	Mar. 31, 2012 Pending or Threatened Litigation [Member] EUR (€)	Mar. 31, 2012 Brazilian State of Parana [Member] Tax Assessment [Member] USD ($)	Oct. 26, 2007 Brazilian State of Parana [Member] Tax Assessment [Member] USD ($)	Mar. 31, 2012 Brazil State of Rio Grande do Sul and the State of Santa Catarina [Member] Tax Assessment [Member] USD ($)	Mar. 31, 2012 IPI Credit Bonus [Member] Tax Assessment [Member] USD ($)	Mar. 31, 2005 Spain [Member] Unfavorable Regulatory Action [Member] USD ($)	Mar. 31, 2005 Spain [Member] Unfavorable Regulatory Action [Member] EUR (€)	Mar. 31, 2006 Italy [Member] USD ($)	Mar. 31, 2006 Italy [Member] Unfavorable Regulatory Action [Member] EUR (€)
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss			$ 17,348	$ 7,230	$ 33,331	$ 26,683
Gain (loss) related to litigation settlement	$ 9,839	€ 7,377					$ 5,641	€ 4,415	$ 28,800	€ 24,000

The net proceeds or assets obtained in excess of (less than) the net carrying amount of assets recorded, or assets distributed and liabilities assumed less than (in excess of) estimated litigation liability extinguished, in settlement of a litigation matter. Represents (for other than an insurance entity in its normal claims settlement process), the amount of income (expense) recognized in the period to settle pending or threatened litigation and insurance claims.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 9, 10, 11, 12

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349

Name:	us-gaap_GainLossRelatedToLitigationSettlement
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration