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Quarterly Results (Tables) | 12 Months Ended
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Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Net Income (Loss) and Earnings (Loss) Per Share |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Earnings (loss) |  |
In thousands, | Net sales |  |  | Gross profit |  |  | Net income (loss) |  |  | per share |  |
except per share | 2017 |  |  |  | 2016 |  |  | 2017 |  |  |  | 2016 |  |  | 2017 |  |  |  | 2016 |  |  | 2017 |  |  |  | 2016 |  |
First | $ | 390,713 |  |  |  | $ | 402,218 |  |  | $ | 56,929 |  |  |  | $ | 57,843 |  |  | $ | 11,603 |  |  |  | $ | 16,168 |  |  | $ | 0.26 |  |  |  | $ | 0.37 |  |
Second |  | 387,342 |  |  |  |  | 406,413 |  |  |  | 30,436 |  |  |  |  | 42,723 |  |  |  | (5,714 | ) |  |  |  | 1,965 |  |  |  | (0.13 | ) |  |  |  | 0.04 |  |
Third |  | 413,325 |  |  |  |  | 405,301 |  |  |  | 54,735 |  |  |  |  | 61,170 |  |  |  | 12,105 |  |  |  |  | 19,601 |  |  |  | 0.27 |  |  |  |  | 0.44 |  |
Fourth |  | 399,917 |  |  |  |  | 390,865 |  |  |  | 50,410 |  |  |  |  | 56,867 |  |  |  | (10,080 | ) |  |  |  | (16,180 | ) |  |  | (0.23 | ) |  |  |  | (0.37 | ) |

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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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