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Summary of Quarterly Financial Data (unaudited) (Tables) | 12 Months Ended
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Dec. 29, 2018
Summary Of Quarterly Financial Data Unaudited [Abstract] |
Summary of Quarterly Financial Data (unaudited) | The following is a condensed summary of our quarterly results (in thousands, except net income (loss) per share amounts). Quarterly diluted net income (loss) per share amounts may not total to the respective annual amount due to changes in weighted-average shares outstanding during the year.
2018 |  | First |  |  | Second |  |  | Third |  |  | Fourth |  |  | Fiscal Year |
Net sales |  | $ | 388,633 |  |  | $ | 316,338 |  |  | $ | 414,779 |  |  | $ | 411,825 |  |  | $ | 1,531,575 |
Gross profit |  |  | 237,477 |  |  |  | 188,888 |  |  |  | 250,517 |  |  |  | 251,079 |  |  |  | 927,961 |
Operating income |  |  | 26,901 |  |  |  | 2,086 |  |  |  | 25,321 |  |  |  | 38,120 |  |  |  | 92,428 |
Net income |  |  | 20,548 |  |  |  | 3,744 |  |  |  | 18,257 |  |  |  | 26,990 |  |  |  | 69,539 |
Net income per share – diluted |  | $ | 0.52 |  |  | $ | 0.10 |  |  | $ | 0.52 |  |  | $ | 0.81 |  |  | $ | 1.92 |
2017 |  | First |  |  | Second |  |  | Third |  |  | Fourth |  |  | Fiscal Year |
Net sales |  | $ | 393,899 |  |  | $ | 284,673 |  |  | $ | 402,646 |  |  | $ | 363,279 |  |  | $ | 1,444,497 |
Gross profit |  |  | 246,459 |  |  |  | 176,619 |  |  |  | 253,465 |  |  |  | 220,804 |  |  |  | 897,347 |
Operating income (loss) |  |  | 35,828 |  |  |  | (3,061 | ) |  |  | 39,029 |  |  |  | 20,119 |  |  |  | 91,915 |
Net income (loss) |  |  | 24,461 |  |  |  | (778 | ) |  |  | 25,603 |  |  |  | 15,791 |  |  |  | 65,077 |
Net income (loss) per share – diluted |  | $ | 0.56 |  |  | $ | (0.02 | ) |  | $ | 0.62 |  |  | $ | 0.39 |  |  | $ | 1.55 |

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- Definition Summary of Quarterly Financial Data (unaudited) [Abstract] + References No definition available. + Details
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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=109225645&loc=d3e1280-108306 + Details
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