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Earnings Per Share - Calculation of Income (Loss) Per Shares (Details) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 05, 2020 | Jun. 30, 2019 | Jul. 05, 2020 | Jun. 30, 2019
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Net income (loss) | $ 4,709 | $ 29,499 | $ (97,458) | $ 36,558
Weighted Average Shares Outstanding (in shares) | 58,024 | 58,760 | 58,006 | 58,934
Participating Securities (in shares) | 460 | 525 | 460 | 525
Shares for Basic Earnings Per Share (in shares) | 58,484 | 59,285 | 58,466 | 59,459
Dilutive Effect of Stock Options (in shares) | 0 | 6 | 0 | 6
Shares for Diluted Earnings Per Share (in shares) | 58,484 | 59,291 | 58,466 | 59,465
Participating Securities |  |  |  |
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Net income (loss) | $ 0 | $ 300 | $ 0 | $ 300

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