Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified					9 Months Ended
	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2013 Accumulated Translation Adjustment [Member]		Sep. 30, 2013 Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net [Rollforward]
Beginning Balance	$ 3,237	[1]	$ 7,356	[1]	$ 3,196		$ 4,160
Other comprehensive income before reclassifications, net of tax					(1,395)	[2]	1,869	[2]
Amounts reclassified from accumulated other comprehensive income, net of tax					0	[2]	(4,593)	[2]
Net other comprehensive income					(1,395)		(2,724)
Ending Balance	$ 3,237	[1]	$ 7,356	[1]	$ 1,801		$ 1,436

[1] As of September 30, 2013 and December 31, 2012, total assets include $5.9 million and $5.6 million, respectively, and total liabilities include $8.7 million and $5.5 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.

[2] Effective tax rate of 38.47%.