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Debt (Secured Convertible Notes) (Details) - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Jun. 28, 2017 | Dec. 29, 2017 | Dec. 30, 2016 | Jan. 01, 2016 | Jun. 27, 2017
Debt Instrument [Line Items] |  |  |  |  |
Interest paid in kind |  | $ (11,825) | $ 8,008 | $ 3,817 |
Accrued and unpaid interest |  | 20,460 | 21,044 | 19,822 |
Loss on extinguishment of debt |  | $ 6,239 | $ 13,901 | $ 0 |
Convertible notes [Member] | Secured Convertible Notes due June 2018 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayment of principal | $ 123,800 |  |  |  |
Extinguishment of debt amount | 113,900 |  |  |  |
Interest paid in kind | 13,900 |  |  |  |
Prepayment penalty | 5,800 |  |  |  |
Accrued and unpaid interest | 4,200 |  |  |  |
Loss on extinguishment of debt | $ 6,200 |  |  |  |
Stated interest after extension option election |  |  |  |  | 15.00%
Coupon interest [Member] | Convertible notes [Member] | Secured Convertible Notes due June 2018 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Stated interest after extension option election |  |  |  |  | 7.50%
Payment-in-kind interest [Member] | Convertible notes [Member] | Secured Convertible Notes due June 2018 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Stated interest after extension option election |  |  |  |  | 7.50%

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