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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |
Amortization of stock-based compensation | $ 34,546 | $ 39,225 | $ 34,613
Percentage of Total Sales | 1.00% | 4.00% | 2.00%
Shipping, Handling and Transportation Costs | $ 83,278 | $ 78,666 | $ 61,423

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