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Quarterly Financial Data (Unaudited) | 12 Months Ended
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Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Data (Unaudited) | Quarterly Financial Data (Unaudited) The supplemental quarterly financial data are as follows:
| Quarters Ended
| April 1, 2017 |  | July 1, 2017 |  | September 30, 2017 |  | December 31, 2017
Net sales | $ | 2,220,645 |  |  | 2,453,038 |  |  | 2,448,510 |  |  | 2,369,097 |
Gross profit | 680,353 |  |  | 779,136 |  |  | 783,301 |  |  | 753,624 |
Net earnings | 200,554 |  |  | 260,681 |  |  | 270,025 |  |  | 240,378 |
Basic earnings per share | 2.70 |  |  | 3.51 |  |  | 3.63 |  |  | 3.23 |
Diluted earnings per share | 2.68 |  |  | 3.48 |  |  | 3.61 |  |  | 3.21 |
| Quarters Ended
| April 2, 2016 |  | July 2, 2016 |  | October 1, 2016 |  | December 31, 2016
Net sales | $ | 2,172,046 |  |  | 2,310,336 |  |  | 2,294,139 |  |  | 2,182,566 |
Gross profit | 639,679 |  |  | 755,588 |  |  | 726,559 |  |  | 690,999 |
Net earnings | 171,548 |  |  | 255,188 |  |  | 269,878 |  |  | 233,748 |
Basic earnings per share | 2.32 |  |  | 3.44 |  |  | 3.64 |  |  | 3.15 |
Diluted earnings per share | 2.30 |  |  | 3.42 |  |  | 3.62 |  |  | 3.13 |

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- References No definition available. + Details
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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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