Goodwill and Other Intangible Assets, Net - Intangible Assets (Details) - USD ($) |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
Dec. 31, 2017 |
|
| Finite-Lived Intangible Assets | |||||
| Accumulated Amortization | $ (257,210,000) | $ (235,000,000) | $ (257,210,000) | $ (235,000,000) | $ (219,026,000) |
| Gross Amount | 788,560,000 | 788,560,000 | 952,323,000 | ||
| Gross Impairment | (114,798,000) | (163,813,000) | |||
| Net Balance | 416,552,000 | 416,552,000 | 569,484,000 | ||
| IPR&D | |||||
| Indefinite-lived Intangible Assets | |||||
| Gross Amount | 149,161,000 | 149,161,000 | 173,757,000 | ||
| Reclassifications | (5,300,000) | 0 | |||
| Gross Impairment | (20,600,000) | $ 0 | (100,073,000) | $ (3,400,000) | (24,596,000) |
| Net Balance | 43,788,000 | 43,788,000 | 149,161,000 | ||
| Product licensing rights | |||||
| Finite-Lived Intangible Assets | |||||
| Gross Amount | 607,939,000 | 607,939,000 | 747,106,000 | ||
| Accumulated Amortization | (241,555,000) | (241,555,000) | (205,549,000) | ||
| Reclassifications | 5,300,000 | 0 | |||
| Gross Impairment | (14,725,000) | (139,217,000) | |||
| Net Balance | 356,959,000 | $ 356,959,000 | $ 402,340,000 | ||
| Wtd Avg Remaining Amortization Period (years) | 8 years 9 months 18 days | 9 years 9 months 18 days | |||
| Trademarks | |||||
| Finite-Lived Intangible Assets | |||||
| Gross Amount | 16,000,000 | $ 16,000,000 | $ 16,000,000 | ||
| Accumulated Amortization | (6,071,000) | (6,071,000) | (5,376,000) | ||
| Reclassifications | 0 | 0 | |||
| Gross Impairment | 0 | 0 | |||
| Net Balance | 9,929,000 | $ 9,929,000 | $ 10,624,000 | ||
| Wtd Avg Remaining Amortization Period (years) | 17 years 6 months | 17 years 9 months 18 days | |||
| Customer relationships | |||||
| Finite-Lived Intangible Assets | |||||
| Gross Amount | 4,225,000 | $ 4,225,000 | $ 4,225,000 | ||
| Accumulated Amortization | (2,253,000) | (2,253,000) | (2,058,000) | ||
| Reclassifications | 0 | 0 | |||
| Gross Impairment | 0 | 0 | |||
| Net Balance | 1,972,000 | $ 1,972,000 | $ 2,167,000 | ||
| Wtd Avg Remaining Amortization Period (years) | 7 years 7 months 6 days | 8 years 3 months 19 days | |||
| Other intangibles | |||||
| Finite-Lived Intangible Assets | |||||
| Gross Amount | 11,235,000 | $ 11,235,000 | $ 11,235,000 | ||
| Accumulated Amortization | (7,331,000) | (7,331,000) | (6,043,000) | ||
| Reclassifications | 0 | 0 | |||
| Gross Impairment | 0 | 0 | |||
| Net Balance | $ 3,904,000 | $ 3,904,000 | $ 5,192,000 | ||
| Wtd Avg Remaining Amortization Period (years) | 5 years 9 months 18 days | 5 years 8 months 12 days | |||