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Quarterly Financial Data (unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Data | Quarterly results of operations for the years ended December 31, 2017 and 2016 are summarized below:
(in millions, except per share amounts) | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
2017 |  |  |  |  |  |  |
Net sales | $ | 722.1 |  |  | $ | 659.3 |  |  | $ | 724.8 |  |  | $ | 648.2 |
Gross profit | 286.6 |  |  | 268.6 |  |  | 312.2 |  |  | 273.3 |
Operating income | 59.5 |  |  | 56.6 |  |  | 94.6 |  |  | 77.7 |
Net income | 33.9 |  |  | 24.5 |  |  | 44.6 |  |  | 48.4 |
Basic earnings per common share | $ | 0.63 |  |  | $ | 0.45 |  |  | $ | 0.83 |  |  | $ | 0.89 |
Diluted earnings per common share | $ | 0.62 |  |  | $ | 0.45 |  |  | $ | 0.81 |  |  | $ | 0.88 |
2016 |  |  |  |  |  |  |
Net sales | $ | 721.0 |  |  | $ | 804.4 |  |  | $ | 832.4 |  |  | $ | 771.1 |
Gross profit | 291.0 |  |  | 336.9 |  |  | 362.1 |  |  | 317.5 |
Operating income | 76.7 |  |  | 100.2 |  |  | 131.1 |  |  | 102.4 |
Net income | 39.6 |  |  | 21.3 |  |  | 77.8 |  |  | 51.9 |
Basic earnings per common share | $ | 0.64 |  |  | $ | 0.35 |  |  | $ | 1.34 |  |  | $ | 0.93 |
Diluted earnings per common share | $ | 0.63 |  |  | $ | 0.35 |  |  | $ | 1.32 |  |  | $ | 0.92 |

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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/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=84173487&loc=d3e1280-108306 + Details
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