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Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2011
Supplemental Cash Flow Information [Abstract] |
Schedule Of Supplemental Cash Flow Information |
Fiscal Year |  | 2011 |  |  | 2010 |  |  | 2009 |
Cash paid during the year for: |  |  |  |  |  |  |  |  |  |  |  |
Interest |  | $ | 3,323 |  |  | $ | 1,026 |  |  | $ | 443 |
Income taxes |  | $ | 135,133 |  |  | $ | 107,787 |  |  | $ | 62,957 |
Supplemental disclosures of non-cash investing and financing activities: |  |  |  |  |  |  |  |  |  |  |  |
Additions to property, plant and equipment included in accounts payable |  | $ | 23,766 |  |  | $ | 8,034 |  |  | $ | 4,349 |
Retirement of treasury stock |  | $ | 482 |  |  | $ | 725 |  |  | $ | 212 |

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