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Quarterly Financial Data (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2010 | Sep. 30, 2010 | Jun. 30, 2010 | Mar. 31, 2010 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Quarterly Financial Data - (Details) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 739,204 | $ 712,705 | $ 699,871 | $ 645,309 | $ 679,479 | $ 605,088 | $ 567,104 | $ 534,441 | $ 2,797,089 | $ 2,386,112 | $ 2,049,668
Gross profit | 405,849 | 382,556 | 377,063 | 350,096 | 371,865 | 321,749 | 301,947 | 279,565 | 1,515,564 | 1,275,126 | 1,043,138
Income from operations | 187,354 | 167,215 | 163,970 | 142,000 | 166,158 | 128,233 | 119,187 | 100,716 | 660,539 | 514,294 | 395,396
Net earnings | $ 121,676 | $ 110,281 | $ 106,311 | $ 88,979 | $ 107,311 | $ 84,263 | $ 71,281 | $ 59,725 | $ 427,247 | $ 322,580 | $ 239,481
Earnings from continuing operations per common share: |  |  |  |  |  |  |  |  |  |  |
Basic | $ 1.26 | $ 1.15 | $ 1.11 | $ 0.93 | $ 1.13 | $ 0.89 | $ 0.76 | $ 0.64 | $ 4.45 | $ 3.42 | $ 2.64
Diluted | $ 1.23 | $ 1.12 | $ 1.08 | $ 0.91 | $ 1.10 | $ 0.87 | $ 0.74 | $ 0.62 | $ 4.34 | $ 3.34 | $ 2.58

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