Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 564		$ 1,491
Relocation of European Headquarters
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Period Increase (Decrease)	377	$ 4,312	2,392	$ 17,267
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 0		$ 0
Synageva BioPharma Corp.
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 3,149		$ 13,470