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Debt (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 | Dec. 31, 2016
Debt Instrument [Line Items] |  |  |  |  |  |
Interest paid in kind |  |  |  | $ (11,825) | $ 3,908 |
Loss on extinguishment of debt |  | $ 6,239 | $ 0 | 6,239 | 0 |
Secured notes [Member] | Secured Convertible Notes Due June 2018 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Repayments of notes payable | $ 123,800 |  |  |  |  |
Repayment of principal, including paid in kind interest | 113,900 |  |  |  |  |
Interest paid in kind | 13,900 | $ 2,083 | $ 1,972 | $ 4,151 | $ 3,908 |
Prepayment penalty amount | 5,800 |  |  |  |  |
Accrued interest paid | 4,200 |  |  |  |  |
Loss on extinguishment of debt | $ 6,200 |  |  |  |  |
Interest rate after extension option election (as a percent) |  | 15.00% |  | 15.00% |  |
Balance of unamortized closing fees and expenses |  |  |  |  |  | $ 400
Secured notes [Member] | Secured Convertible Notes Due June 2018 [Member] | Coupon Interest [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate after extension option election (as a percent) |  | 7.50% |  | 7.50% |  |
Secured notes [Member] | Secured Convertible Notes Due June 2018 [Member] | Payment-in-kind interest [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate after extension option election (as a percent) |  | 7.50% |  | 7.50% |  |

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