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Selected Quarterly Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010
Selected Quarterly Financial Data [Abstract] |  |
Selected Quarterly Financial Data |
2011 : |  | Net sales |  |  | Gross profit |  |  | Pre-tax earnings |  |  | Net earnings |  |  | Basic earnings per share1 |
First quarter |  | $ | 640,583 |  |  |  | 333,380 |  |  |  | 128,811 |  |  |  | 79,547 |  |  |  | 0.27 |
Second quarter |  |  | 701,730 |  |  |  | 366,233 |  |  |  | 150,182 |  |  |  | 94,112 |  |  |  | 0.32 |
Third quarter |  |  | 726,742 |  |  |  | 377,381 |  |  |  | 155,319 |  |  |  | 96,798 |  |  |  | 0.33 |
Fourth quarter |  |  | 697,804 |  |  |  | 357,178 |  |  |  | 140,769 |  |  |  | 87,472 |  |  |  | 0.30 |
Total |  | $ | 2,766,859 |  |  |  | 1,434,172 |  |  |  | 575,081 |  |  |  | 357,929 |  |  |  | 1.21 |
1 Note – Amounts may not foot due to rounding difference. |
2010 : |  | Net sales |  |  | Gross profit |  |  | Pre-tax earnings |  |  | Net earnings |  |  | Basic earnings per share1 |
First quarter |  | $ | 520,772 |  |  |  | 265,913 |  |  |  | 90,669 |  |  |  | 56,034 |  |  |  | 0.19 |
Second quarter |  |  | 571,183 |  |  |  | 297,658 |  |  |  | 112,125 |  |  |  | 69,167 |  |  |  | 0.23 |
Third quarter |  |  | 603,750 |  |  |  | 312,648 |  |  |  | 120,702 |  |  |  | 74,994 |  |  |  | 0.25 |
Fourth quarter |  |  | 573,766 |  |  |  | 298,617 |  |  |  | 107,144 |  |  |  | 65,161 |  |  |  | 0.22 |
Total |  | $ | 2,269,471 |  |  |  | 1,174,836 |  |  |  | 430,640 |  |  |  | 265,356 |  |  |  | 0.90 |
1 Note – Amounts may not foot due to rounding difference.

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