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Investments In Affiliated Companies, Partnership And Other Companies (Balance Sheet Information) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2011 | Dec. 31, 2010
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Investments In Affiliated Companies, Partnership And Other Companies [Abstract] |  |
Current assets | $ 272,274 | $ 278,141
Non-current assets | 67,151 | 69,507
Total assets | 339,425 | 347,648
Current liabilities | 158,548 | 186,555
Non-current liabilities | 24,809 | 34,688
Shareholders' equity | 156,068 | 126,405
Total liabilities | $ 339,425 | $ 347,648

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