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Other Current Assets (Tables) | 12 Months Ended
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Dec. 31, 2011
Other Current Assets [Abstract] |
Other Current Assets |
|  | December 31, |
|  | 2011 |  |  | 2010 |
Deposits in trusts for employee benefits and retirement plans |  | $ | 87,646 |  |  | $ | 82,335 |
Other |  |  | 57,791 |  |  |  | 59,126 |
|  | $ | 145,437 |  |  | $ | 141,461 |

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- Definition Schedule of other current assets [Table Text Block] + References No definition available. + Details
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