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Derivatives And Risk Management (Schedule Of Foreign Currency Forward Hedge Contracts) (Details)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2011
European Euro [Member]
USD ($)
Dec. 31, 2011
European Euro [Member]
EUR (€)
Dec. 31, 2011
British Pound [Member]
USD ($)
Dec. 31, 2011
British Pound [Member]
GBP (£)
Dec. 31, 2011
Japanese Yen [Member]
USD ($)
Dec. 31, 2011
Japanese Yen [Member]
JPY (¥)
Dec. 31, 2011
Mexican Peso [Member]
USD ($)
Dec. 31, 2011
Mexican Peso [Member]
MXN
Dec. 31, 2011
Australian Dollar [Member]
USD ($)
Dec. 31, 2011
Australian Dollar [Member]
AUD
Dec. 31, 2011
Canadian Dollar [Member]
USD ($)
Dec. 31, 2011
Canadian Dollar [Member]
CAD
Derivative [Line Items]                          
Notional Amount of Foreign Currency Derivative Purchase Contracts   $ 156,579 € 113,305 $ 23,726 £ 14,918 $ 33,265 ¥ 2,762,700 $ 7,250 97,743 $ 7,689 8,320 $ 16,640 16,622
Forecasted Purchases to Manage Fluctuations 65.00%