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Earnings Per Share - Calculation of Income (Loss) Per Shares (Details) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 04, 2020 | Sep. 29, 2019 | Oct. 04, 2020 | Sep. 29, 2019
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Net income (loss) | $ 5,913 | $ 26,210 | $ (91,545) | $ 62,768
Weighted Average Shares Outstanding (in shares) | 58,140 | 57,915 | 58,055 | 58,599
Participating Securities (in shares) | 452 | 518 | 452 | 518
Shares for Basic Earnings Per Share (in shares) | 58,592 | 58,433 | 58,507 | 59,117
Dilutive Effect of Stock Options (in shares) | 0 | 1 | 0 | 5
Shares for Diluted Earnings Per Share (in shares) | 58,592 | 58,434 | 58,507 | 59,122
Participating Securities |  |  |  |
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Net income (loss) | $ 0 | $ 200 | $ 0 | $ 600

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