Derivative Instruments (Fair Value Of Outstanding Derivative Contracts Recorded As Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Derivatives, Fair Value [Line Items]
Total asset derivatives	$ 803	$ 400
Derivatives Designated As Hedging Instruments Under ASC 815 [Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives	788	366
Derivatives Designated As Hedging Instruments Under ASC 815 [Member] | Foreign Exchange Contracts [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives	694	321
Derivatives Designated As Hedging Instruments Under ASC 815 [Member] | Foreign Exchange Contracts [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives	94
Derivatives Designated As Hedging Instruments Under ASC 815 [Member] | Natural Gas Contracts [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives		2
Derivatives Designated As Hedging Instruments Under ASC 815 [Member] | Natural Gas Contracts [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives		6
Derivatives Designated As Hedging Instruments Under ASC 815 [Member] | Currency Swap [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives		37
Derivatives Not Designated As Hedging Instruments Under ASC 815 [Member] | Foreign Exchange Contracts [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives	$ 15	$ 34