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Operating Segment Information (Schedule Of Long-Lived Assets By Geographic Region) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived Assets $ 261,223 $ 261,771
United States [Member]
   
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived Assets 256,377 254,809
Mexico [Member]
   
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-lived Assets $ 4,846 $ 6,962