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Property, Plant And Equipment, Net (Schedule Of Property, Plant And Equipment, Net) (Details) (USD $)
In Thousands
Sep. 30, 2011
Dec. 31, 2010
Property, Plant And Equipment, Net [Abstract]  
Property, plant and equipment, gross$ 457,106$ 440,570
Less: Accumulated depreciation and amortization(276,473)(243,404)
Property, plant and equipment, net$ 180,633$ 197,166