Acquisitions, Investments, and Licenses - Schedule of Consolidated Assets and Non-Recourse Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013		Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 156,396	[1]	$ 185,798	[1]	$ 181,596	$ 27,361
Accounts receivable, net	19,664	[1]	19,767	[1]
Inventory, net	18,865	[1]	18,079	[1]
Prepaid expenses and other current assets	10,347	[1]	19,084	[1]
Total current assets	205,272	[1]	242,728	[1]
Property, plant and equipment, net	16,881	[1]	17,027	[1]
Intangible assets, net	71,921	[1]	74,533	[1]
Goodwill	226,062	[1]	226,373	[1]
Other assets	6,520	[1]	6,861	[1]
Total assets	1,355,692	[1]	1,391,516	[1]
Current liabilities:
Accounts payable	14,696	[1]	13,414	[1]
Accrued expenses	58,772	[1]	65,874	[1]
Total current liabilities	84,500	[1]	91,850	[1]
Other long-term liabilities	215,142	[1]	214,775	[1]
Total liabilities	524,443	[1]	518,537	[1]
SciVac [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Current assets:
Cash and cash equivalents	123		2
Accounts receivable, net	103		283
Inventory, net	1,704		1,696
Prepaid expenses and other current assets	337		218
Total current assets	2,267		2,199
Property, plant and equipment, net	1,441		1,374
Intangible assets, net	1,073		1,111
Goodwill	1,732		1,821
Other assets	268		261
Total assets	6,781		6,766
Current liabilities:
Accounts payable	1,223		1,136
Accrued expenses	7,800		6,498
Notes payable	2,101		1,537
Total current liabilities	11,124		9,171
Other long-term liabilities	266		1,240
Total liabilities	$ 11,390		$ 10,411

[1] As of March 31, 2014 and December 31, 2013, total assets include $6.8 million and $6.7 million, respectively, and total liabilities include $11.4 million and $10.4 million, respectively, related to SciVac Ltd (“SciVac”), previously known as SciGen (I.L.) Ltd, a consolidated variable interest entity. SciVac’s consolidated assets are owned by SciVac and SciVac’s consolidated liabilities have no recourse against us. Refer to Note 5.