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Acquisitions (Pro Forma Information) (Details) (USD $) In Thousands, except Per Share data | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2011 | Jun. 30, 2010 | Jun. 30, 2011 | Jun. 30, 2010
Acquisitions |  |  |  |
Net sales, Pro forma | $ 486,895 | $ 426,364 | $ 963,031 | $ 827,526
Net income, Pro forma | $ 50,810 | $ 39,032 | $ 99,875 | $ 66,406
Diluted earnings per share, Pro forma | $ 0.61 | $ 0.48 | $ 1.19 | $ 0.81

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- Definition The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph r(2, 3) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 54 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 55 + Details
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