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Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Oct. 01, 2016 | Sep. 30, 2017 | Oct. 01, 2016
Summary of Significant Accounting Policies [Line Items] |  |  |  |
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent |  |  | $ 114,700 | $ 46,200
Minimum fiscal year period in days |  |  | 364 days |
Maximum fiscal year period in days |  |  | 371 days |
Fiscal quarter period in days | 91 days | 91 days |  |
Fiscal Year to Date in Days |  |  | 273 days | 273 days
Basic: |  |  |  |
Net income | $ 7,761 | $ 28,694 | $ 22,739 | $ 61,772
Shares (in shares) | 164,735,000 | 164,653,000 | 164,734,000 | 164,574,000
Per Share (in usd per share) | $ 0.05 | $ 0.17 | $ 0.14 | $ 0.38
Effect of dilutive securities: [Abstract] |  |  |  |
Add: Option shares in the money and dilutive effect of non-vested stock (in shares) | 4,759,000 | 1,717,000 | 3,645,000 | 1,222,000
Less: Pro forma treasury shares (in shares) | (2,313,000) | (934,000) | (1,751,000) | (642,000)
Diluted: |  |  |  |
Net Income | $ 7,761 | $ 28,694 | $ 22,739 | $ 61,772
Shares (in shares) | 167,181,000 | 165,436,000 | 166,628,000 | 165,154,000
Per Share (in usd per share) | $ 0.05 | $ 0.17 | $ 0.14 | $ 0.37
Stock Options [Member] |  |  |  |
Antidilutive Securities [Abstract] |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 212,525 | 1,228,334 | 723,052 | 1,122,165
Non Vested Stock [Member] |  |  |  |
Antidilutive Securities [Abstract] |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 437,897 | 887,413 | 650,758 | 812,780

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