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Debt - Debt Modification and Loss on Debt Extinguishment (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2016 | Jun. 30, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Debt Instrument [Line Items] |  |  |  |  |
Deferred financing costs |  |  | $ 81,242 | $ 11,582 | $ 13,020
Loss on debt extinguishment |  |  | 8,392 | $ 17,363 | 1,263
Switzerland and Glion Institutions |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Loss on debt extinguishment |  |  |  |  | 932
Convertible Debt | Exchanged Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Write off of deferred debt issuance costs |  | $ 1,681 | 8,392 |  |
Deferred financing costs |  |  | 70,800 |  |
Convertible Debt | Exchanged Notes | General and Administrative Expense |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Loss on modification of debt |  |  | $ 22,800 |  |
Convertible Debt | Fifth Amendment and Restated Credit Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Write off of deferred debt issuance costs | $ 15,682 |  |  |  |
Lines of credit | Senior Secured Credit Facility | Revolving Credit Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Write off of deferred debt issuance costs |  |  |  |  | $ 331

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- Definition Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 + Details
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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629 Reference 2: 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=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12355-112629 + Details
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