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Segment Reporting Summary Of Information Of Long-Lived Assets In Different Geographic Areas (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, plant and equipment $ 820,985 [1] $ 833,907 [1]
United States And Canada [Member]
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, plant and equipment 540,274 [1] 523,818 [1]
MEXICO
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, plant and equipment 83,428 [1] 79,279 [1]
BRAZIL
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, plant and equipment 26,008 [1] 47,593 [1]
FRANCE
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, plant and equipment 61,264 [1] 55,792 [1]
SPAIN
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, plant and equipment 82,051 [1] 78,392 [1]
SOUTH AFRICA
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, plant and equipment 16,408 [1] 36,937 [1]
SWITZERLAND
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, plant and equipment 4,618 [1] 4,829 [1]
Other Countries [Member]
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net property, plant and equipment $ 6,934 [1] $ 7,267 [1]
[1] Long-lived assets represent fixed assets, net of accumulated depreciation.