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Selected Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2012
Selected Quarterly Financial Information [Abstract] |
Schedule of Quarterly Financial Information |
2012 : | Net sales |  | Gross profit |  | Pre-tax earnings |  | Net earnings |  | Basic net earnings per share 1
First quarter | $ | 768,875 |  |  | 394,177 |  |  | 161,129 |  |  | 100,194 |  |  | 0.34 |
Second quarter | 804,890 |  |  | 415,151 |  |  | 179,039 |  |  | 112,306 |  |  | 0.38 |
Third quarter | 802,577 |  |  | 414,375 |  |  | 175,836 |  |  | 109,320 |  |  | 0.37 |
Fourth quarter | 757,235 |  |  | 390,821 |  |  | 158,151 |  |  | 98,716 |  |  | 0.33 |
Total | $ | 3,133,577 |  |  | 1,614,524 |  |  | 674,155 |  |  | 420,536 |  |  | 1.42 |
2011 : | Net sales |  | Gross profit |  | Pre-tax earnings |  | Net earnings |  | Basic net earnings per share 1
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.

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=20225539&loc=d3e1280-108306 + Details
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