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Investments In Affiliated Companies, Partnership And Other Companies (Investments In Affiliated Companies) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Investments In Affiliated Companies, Partnership And Other Companies [Abstract]    
Companies accounted for under the equity method $ 105,914 $ 86,069
Companies accounted for on a cost basis 4,245 3,745
Investments in affiliated companies $ 110,159 $ 89,814