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Selected Quarterly Financial Data (Unaudited) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract] |
Selected Quarterly Financial Data (Unaudited) |
| Quarter Ended
| April 1, 2018 |  | July 1, 2018 |  | September 30, 2018 |  | December 31, 2018
| (In thousands, except per share amounts)
Revenue | $ | 169,567 |  |  | $ | 211,264 |  |  | $ | 232,221 |  |  | $ | 193,286 |
Gross margin | 129,369 |  |  | 157,095 |  |  | 173,361 |  |  | 140,461 |
Operating income | 34,596 |  |  | 63,455 |  |  | 77,844 |  |  | 45,247 |
Net income | $ | 37,217 |  |  | $ | 56,196 |  |  | $ | 80,436 |  |  | $ | 45,418 |
Basic net income per share | $ | 0.21 |  |  | $ | 0.33 |  |  | $ | 0.47 |  |  | $ | 0.26 |
Diluted net income per share | $ | 0.21 |  |  | $ | 0.32 |  |  | $ | 0.45 |  |  | $ | 0.26 |
| Quarter Ended
| April 2, 2017 |  | July 2, 2017 |  | October 1, 2017 |  | December 31, 2017
| (In thousands, except per share amounts)
Revenue | $ | 139,039 |  |  | $ | 178,080 |  |  | $ | 266,042 |  |  | $ | 182,922 |
Gross margin | 106,507 |  |  | 135,916 |  |  | 197,981 |  |  | 138,390 |
Operating income | 37,216 |  |  | 60,021 |  |  | 110,849 |  |  | 50,775 |
Net income (loss) | $ | 45,471 |  |  | $ | 56,495 |  |  | $ | 102,493 |  |  | $ | (27,747 | )
Basic net income (loss) per share (1) | $ | 0.26 |  |  | $ | 0.33 |  |  | $ | 0.59 |  |  | $ | (0.16 | )
Diluted net income (loss) per share (1) (2) | $ | 0.25 |  |  | $ | 0.32 |  |  | $ | 0.57 |  |  | $ | (0.16 | )
(1) Prior period results have been adjusted to reflect the two-for-one stock split effected in the form of a stock dividend which occurred in the quarter ended December 31, 2017. (2) As a result of the net loss recorded for the quarter ended December 31, 2017, potential common stock equivalents of 7,145 were not included in the calculation of diluted net loss per share for this quarter.

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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