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Inventories (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
At lower of LIFO cost or market: |  |  |
Live hogs and materials | $ 258,638,000 | $ 228,624,000 |
Fresh pork and materials | 31,495,000 | 29,426,000 |
Inventories at lower of LIFO cost or market, Gross | 290,133,000 | 258,050,000 |
LIFO adjustment | (90,730,000) | (57,783,000) |
Total inventories at lower of LIFO cost or market | 199,403,000 | 200,267,000 |
At lower of FIFO cost or market: |  |  |
Grains, oilseeds and other commodities | 317,573,000 | 251,839,000 |
Sugar produced and in process | 65,986,000 | 78,730,000 |
Other | 73,606,000 | 63,449,000 |
Total inventories at lower of FIFO cost or market | 457,165,000 | 394,018,000 |
Grain, flour and feed at lower of weighted average cost or market | 100,296,000 | 50,645,000 |
Total inventories | 756,864,000 | 644,930,000 |
LIFO method increase (decrease) in earnings | (20,098,000) | (20,556,000) | (780,000)
LIFO method increase (decrease) in earnings per share (in dollars per share) | $ 16.70 | $ 16.92 | $ 0.64
Amount that inventories would have been higher by if the FIFO method had been used | $ 90,730,000 | $ 57,783,000 |

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