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Selected Quarterly Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2018
Selected Quarterly Financial Information [Abstract] |
Schedule of Quarterly Financial Data |
2018 |  | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
Net sales |  | $ | 359,864 |  | $ | 413,613 |  | $ | 356,346 |  | $ | 330,051
Gross profit |  | 203,362 |  | 234,975 |  | 195,184 |  | 166,747
Net income attributable to IPG Photonics Corporation |  | 106,334 |  | 121,617 |  | 100,517 |  | 75,559
Basic earnings per share |  | 1.98 |  | 2.27 |  | 1.88 |  | 1.42
Diluted earnings per share |  | 1.93 |  | 2.21 |  | 1.84 |  | 1.40
2017 |  | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
Net sales |  | $ | 285,846 |  | $ | 369,373 |  | $ | 392,615 |  | $ | 361,055
Gross profit |  | 157,267 |  | 206,296 |  | 224,555 |  | 208,793
Net income attributable to IPG Photonics Corporation |  | 74,945 |  | 104,116 |  | 115,597 |  | 52,956
Basic earnings per share |  | 1.40 |  | 1.95 |  | 2.16 |  | 0.99
Diluted earnings per share |  | 1.38 |  | 1.91 |  | 2.11 |  | 0.96

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109225645&loc=d3e1280-108306 + Details
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