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Intangible Assets and Goodwill (Tables) | 6 Months Ended
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Jun. 30, 2017
Intangible Assets and Goodwill |
Schedule of intangible assets, net of accumulated amortization, and goodwill |
|  |  |  | June 30, 2017 |  | December 31, 2016 |
|  | Estimated Life |  | Cost |  | Accumulated Amortization |  | Net |  | Cost |  | Accumulated Amortization |  | Net |
|  | (In thousands) |
Intangible Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
IPR&D |  | Indefinite |  | $ | 73,490 |  | $ | — |  | $ | 73,490 |  | $ | 73,490 |  | $ | — |  | $ | 73,490 |
Amgen Amendment |  | 16 years |  | 14,500 |  | (6,951 | ) | 7,549 |  | 14,500 |  | (6,503 | ) | 7,997 |
Total Intangible Assets |  |  |  | $ | 87,990 |  | $ | (6,951 | ) | $ | 81,039 |  | $ | 87,990 |  | $ | (6,503 | ) | $ | 81,487 |
Goodwill |  | Indefinite |  | $ | 90,976 |  | $ | — |  | $ | 90,976 |  | $ | 90,976 |  | $ | — |  | $ | 90,976 |

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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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