Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net [Rollforward]
Beginning Balance	$ (12,392)	[1]
Other comprehensive income before reclassifications, net of tax	(5,111)
Amounts reclassified from accumulated other comprehensive income, net of tax	0
Net other comprehensive loss	(5,111)
Ending Balance	(17,503)	[1]
Foreign currency
Accumulated Other Comprehensive Income (Loss), Net [Rollforward]
Beginning Balance	(6,717)
Other comprehensive income before reclassifications, net of tax	(3,852)
Amounts reclassified from accumulated other comprehensive income, net of tax	0
Net other comprehensive loss	(3,852)
Ending Balance	(10,569)
Unrealized gain (loss) in Accumulated OCI
Accumulated Other Comprehensive Income (Loss), Net [Rollforward]
Beginning Balance	(5,675)
Other comprehensive income before reclassifications, net of tax	(1,259)
Amounts reclassified from accumulated other comprehensive income, net of tax	0
Net other comprehensive loss	(1,259)
Ending Balance	$ (6,934)

[1] As of March 31, 2015 and December 31, 2014, total assets include $7.1 million and $7.6 million, respectively, and total liabilities include $12.1 million and $12.1 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.