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Investments In Affiliated Companies, Partnership And Other Companies (Balance Sheet Information) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Investments In Affiliated Companies, Partnerships And Other Companies [Abstract] |  |
Current assets | $ 278,751 | $ 272,274
Non-current assets | 114,289 | 67,151
Total assets | 393,040 | 339,425
Current liabilities | 118,506 | 158,548
Non-current liabilities | 44,137 | 24,809
Shareholders' equity | 230,397 | 156,068
Total liabilities | $ 393,040 | $ 339,425

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