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Debt (Interest Expense on Deerfield Notes) (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jun. 28, 2017 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Debt Instrument [Line Items] |  |  |  |  |
Interest paid in kind |  |  |  | $ (11,825) | $ 3,908
Amortization of debt discounts and debt issuance costs |  |  |  | 182 | 6,411
Secured notes [Member] | Secured Convertible Notes Due June 2018 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Stated coupon interest |  | $ 2,083 | $ 1,972 | 4,151 | 3,908
Interest paid in kind | $ 13,900 | 2,083 | 1,972 | 4,151 | 3,908
Amortization of debt discounts and debt issuance costs |  | 93 | 113 | 182 | 206
Total interest expense |  | $ 4,259 | $ 4,057 | $ 8,484 | $ 8,022

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- Definition Amount of amortization expense attributable to debt discount (premium) and debt issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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- Definition Amount of the cost of borrowed funds accounted for as interest expense for debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Interest paid other than in cash for example by issuing additional debt securities. As a noncash item, it is added to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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