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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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Coupon Interest on Debt

+ References

No definition available.

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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

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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

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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

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