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Collaborative and Other Relationships Collaborative and Other Relationships - Equity Method Investments (Details) $ in Thousands, ₩ in Billions | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Feb. 29, 2012 USD ($) | Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Dec. 31, 2013 USD ($) | Jun. 30, 2015 USD ($) | Jun. 30, 2015 KRW (₩) | Jun. 30, 2014 USD ($) | Jun. 30, 2015 KRW (₩) | Dec. 31, 2014 USD ($) | Dec. 31, 2014 KRW (₩) | Feb. 29, 2012 KRW (₩)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Recognized loss |  | $ (4,881) | $ (1,933) |  | $ (5,715) |  | $ (9,538) |  |  |  |
Research and development |  | 490,728 | 447,273 |  | 951,277 |  | 976,157 |  |  |  |
Revenue related to technical development and technology transfer services |  | 55,566 | 61,864 |  | 107,596 |  | 151,965 |  |  |  |
Samsung Biosimilar Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contribution from Samsung to develop, manufacture and market biosimilar pharmaceuticals | $ 250,000 |  |  |  |  |  |  |  |  |  | ₩ 280.5
Variable interest entity, qualitative or quantitative information, ownership percentage | 85.00% |  |  |  |  |  |  |  |  |  |
Contribution from Biogen to develop, manufacture and market biosimilar pharmaceuticals | $ 45,000 | $ 6,800 |  |  | $ 6,800 |  |  | ₩ 7.5 | $ 8,600 | ₩ 9.1 | ₩ 49.5
Percentage of stake in entity minimum | 15.00% | 10.00% |  |  | 10.00% |  |  | 10.00% |  |  | 15.00%
Additional contribution made to Samsung Bioepis |  |  |  |  | $ 5,700 | ₩ 6.3 |  |  |  |  |
Percentage of stake in entity maximum | 49.90% |  |  |  |  |  |  |  |  |  |
Recognized loss |  | $ (4,900) | (1,900) |  | (5,700) |  | (9,500) |  |  |  |
Research and development |  |  |  | $ 46,000 |  |  |  |  |  |  |
Additional milestone payment |  |  |  | $ 75,000 |  |  |  |  |  |  |
Expected profit share with Samsung Bioepis |  |  |  | 50.00% |  |  |  |  |  |  |
Revenue related to technical development and technology transfer services |  | $ 17,200 | $ 12,300 |  | $ 36,100 |  | $ 36,500 |  |  |  |

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