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.

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

Name:	us-gaap_NotionalAmountOfForeignCurrencyDerivativeSaleContracts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Financial Instruments, Derivative Instruments And Hedging (Schedule Of Maturity Of Foreign Currency Derivative Contracts) (Details) In Thousands, unless otherwise specified	Dec. 31, 2011 USD ($)	Dec. 31, 2011 EUR (€)	Dec. 31, 2011 Maturity 2012 [Member] USD ($)	Dec. 31, 2011 Maturity 2012 [Member] EUR (€)	Dec. 31, 2011 Maturity 2013 [Member] USD ($)	Dec. 31, 2011 Maturity 2013 [Member] EUR (€)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Euro Amount to Sell		€ 54,244		€ 27,244		€ 27,000
Settlement Amount at Contract Rate	65,861		32,894		32,967
Market Value of Euro Receivable, if unhedged, as of the Balance Sheet Date	$ 70,483		$ 35,275		$ 35,208