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15. Quarterly Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2012
Quarterly Financial Data [Abstract] |
Schedule of Quarterly Financial Data [Table Text Block] |
|  | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
2012 |  |  |  |  |  |  |  |
Net sales |  | $ | 486.3 |  |  | $ | 510.4 |  |  | $ | 498.7 |  |  | $ | 573.8 |
Gross profit |  | 278.6 |  |  | 287.9 |  |  | 273.5 |  |  | 314.1 |
Net income attributable to Bio-Rad |  | 31.0 |  |  | 48.3 |  |  | 42.4 |  |  | 42.0 |
Basic earnings per share |  | $ | 1.10 |  |  | $ | 1.71 |  |  | $ | 1.50 |  |  | $ | 1.48 |
Diluted earnings per share |  | $ | 1.09 |  |  | $ | 1.69 |  |  | $ | 1.48 |  |  | $ | 1.46 |
2011 |  |  |  |  |  |  |  |
Net sales |  | $ | 485.1 |  |  | $ | 521.7 |  |  | $ | 516.5 |  |  | $ | 550.2 |
Gross profit |  | 277.6 |  |  | 293.1 |  |  | 296.2 |  |  | 311.0 |
Net income attributable to Bio-Rad |  | 33.0 |  |  | 40.0 |  |  | 45.9 |  |  | 59.2 |
Basic earnings per share |  | $ | 1.18 |  |  | $ | 1.43 |  |  | $ | 1.63 |  |  | $ | 2.11 |
Diluted earnings per share |  | $ | 1.16 |  |  | $ | 1.41 |  |  | $ | 1.61 |  |  | $ | 2.08 |

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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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