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Property, Plant and Equipment (Details) (USD $) | 12 Months Ended |  | 12 Months Ended | 3 Months Ended | 12 Months Ended |  |  | 12 Months Ended |  |  |  | 12 Months Ended |  |  | 12 Months Ended |  |  |
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Dec. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2012 Minimum | Dec. 31, 2012 Maximum | Oct. 01, 2011 Mexico ham boning and processing plant | Dec. 31, 2012 Mexico ham boning and processing plant | Dec. 31, 2012 Land and improvements | Dec. 31, 2011 Land and improvements | Dec. 31, 2012 Land and improvements Minimum | Dec. 31, 2012 Land and improvements Maximum | Dec. 31, 2012 Buildings and improvements | Dec. 31, 2011 Buildings and improvements | Dec. 31, 2012 Machinery and equipment | Dec. 31, 2011 Machinery and equipment | Dec. 31, 2012 Machinery and equipment Minimum | Dec. 31, 2012 Machinery and equipment Maximum | Dec. 31, 2012 Vessels and vehicles | Dec. 31, 2011 Vessels and vehicles | Dec. 31, 2012 Vessels and vehicles Minimum | Dec. 31, 2012 Vessels and vehicles Maximum | Dec. 31, 2012 Office furniture and fixtures | Dec. 31, 2011 Office furniture and fixtures | Dec. 31, 2012 Construction in progress | Dec. 31, 2011 Construction in progress
Property, plant and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful Lives |  |  | 3 years | 30 years |  |  |  |  | 0 years | 15 years | 30 years |  |  |  | 3 years | 20 years |  |  | 3 years | 18 years | 5 years |  |  |
Gross property, plant and equipment | $ 1,656,508,000 | $ 1,744,356,000 |  |  |  |  | $ 186,971,000 | $ 173,517,000 |  |  | $ 384,535,000 | $ 376,659,000 | $ 942,631,000 | $ 794,435,000 |  |  | $ 157,368,000 | $ 147,125,000 |  |  | $ 29,972,000 | $ 28,376,000 | $ 42,879,000 | $ 136,396,000
Accumulated depreciation and amortization | (859,686,000) | (900,477,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net property, plant and equipment | 796,822,000 | 843,879,000 |  |  |  | 3,666,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period of plant operation |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment charge | 5,600,000 |  |  |  | 5,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment charge offset by reduction to noncontrolling interest |  |  |  |  | 1,830,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total impact on net earnings attributable to Seaboard, net of taxes |  |  |  |  | $ 2,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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