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Selected Quarterly Consolidated Financial Data (unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2020
Selected Quarterly Financial Information [Abstract] |
Schedule Of Selected Quarterly Consolidated Financial Data (unaudited) |
(in thousands, except per-share amounts) |  | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
2020 |  |  |  |  |  |  |  |
Net sales |  | $ | 559,417 |  |  | $ | 410,864 |  |  | $ | 512,869 |  |  | $ | 527,781 |
Gross profit |  | 180,907 |  |  | 96,738 |  |  | 166,607 |  |  | 150,780 |
Net income |  | 85,541 |  |  | 22,349 |  |  | 95,794 |  |  | 66,884 |
Earnings per share - basic and diluted |  | 7.67 |  |  | 2.05 |  |  | 8.77 |  |  | 6.12 |
2019 |  | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
Net sales |  | $ | 536,616 |  |  | $ | 563,417 |  |  | $ | 555,817 |  |  | $ | 534,445 |
Gross profit |  | 152,869 |  |  | 170,833 |  |  | 162,727 |  |  | 143,440 |
Net income |  | 62,205 |  |  | 74,174 |  |  | 67,805 |  |  | 50,102 |
Earnings per share - basic and diluted |  | 5.57 |  |  | 6.63 |  |  | 6.06 |  |  | 4.48 |

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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=121640914&loc=d3e1280-108306 + Details
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