Financial Instruments (Fair Values Of Derivative Instruments Designated As Hedging Instruments) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Total asset derivatives	$ 447	$ 204
Total liability derivatives	957	633
Other assets - current [Member] | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives	447	204
Derivative Liabilities - Current [Member] | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Total liability derivatives	$ 957	$ 633