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Quarterly Results Of Operations (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Quarterly Results of Operations | Interim unaudited financial information follows:
(In thousands, except per share amounts) | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter |  | Year
Year ended December 31, 2017 |  |  |  |  |  |  |  |  |
Net sales | $ | 498,336 |  |  | $ | 547,483 |  |  | $ | 554,814 |  |  | $ | 547,137 |  |  | $ | 2,147,770 |
Gross profit | 124,014 |  |  | 131,087 |  |  | 121,220 |  |  | 116,793 |  |  | 493,114 |
Income before income taxes | 58,692 |  |  | 62,626 |  |  | 47,616 |  |  | 43,910 |  |  | 212,844 |
Net income | 43,145 |  |  | 40,137 |  |  | 32,138 |  |  | 17,464 |  |  | 132,884 |
Net income per common share: |  |  |  |  |  |  |  |  |
Basic | $ | 1.73 |  |  | $ | 1.61 |  |  | $ | 1.28 |  |  | $ | 0.70 |  |  | $ | 5.31 |
Diluted | $ | 1.71 |  |  | $ | 1.59 |  |  | $ | 1.26 |  |  | $ | 0.68 |  |  | $ | 5.24 |
Stock market price: |  |  |  |  |  |  |  |  |
High | $ | 117.15 |  |  | $ | 106.23 |  |  | $ | 116.63 |  |  | $ | 132.73 |  |  | $ | 132.73 |
Low | $ | 94.98 |  |  | $ | 86.25 |  |  | $ | 93.08 |  |  | $ | 104.15 |  |  | $ | 86.25 |
Close (at end of quarter) | $ | 99.80 |  |  | $ | 102.40 |  |  | $ | 115.85 |  |  | $ | 130.00 |  |  | $ | 130.00 |
Year ended December 31, 2016 |  |  |  |  |  |  |  |  |
Net sales | $ | 422,798 |  |  | $ | 440,831 |  |  | $ | 412,370 |  |  | $ | 402,899 |  |  | $ | 1,678,898 |
Gross profit | 108,441 |  |  | 116,904 |  |  | 105,550 |  |  | 98,008 |  |  | 428,903 |
Income before income taxes | 55,252 |  |  | 58,975 |  |  | 44,742 |  |  | 40,203 |  |  | 199,172 |
Net income | 35,959 |  |  | 37,569 |  |  | 29,844 |  |  | 26,299 |  |  | 129,671 |
Net income per common share: |  |  |  |  |  |  |  |  |
Basic | $ | 1.46 |  |  | $ | 1.52 |  |  | $ | 1.21 |  |  | $ | 1.06 |  |  | $ | 5.26 |
Diluted | $ | 1.45 |  |  | $ | 1.51 |  |  | $ | 1.19 |  |  | $ | 1.05 |  |  | $ | 5.20 |
Stock market price: |  |  |  |  |  |  |  |  |
High | $ | 65.00 |  |  | $ | 85.38 |  |  | $ | 103.19 |  |  | $ | 113.65 |  |  | $ | 113.65 |
Low | $ | 51.67 |  |  | $ | 60.53 |  |  | $ | 83.74 |  |  | $ | 80.65 |  |  | $ | 51.67 |
Close (at end of quarter) | $ | 64.46 |  |  | $ | 84.84 |  |  | $ | 98.02 |  |  | $ | 107.75 |  |  | $ | 107.75 |

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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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