Revenue Recognition, Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of revenue [Abstract]
Total revenues	$ 220,200	$ 100,772	$ 338,014	$ 217,630
U.S. Government [Member]
Disaggregation of revenue [Abstract]
Total revenues	185,147		265,977
Non-U.S. Government [Member]
Disaggregation of revenue [Abstract]
Total revenues	35,053		72,037
Product Sales [Member]
Disaggregation of revenue [Abstract]
Total revenues	180,075	63,610	255,846	145,579
Product Sales [Member] | U.S. Government [Member]
Disaggregation of revenue [Abstract]
Total revenues	169,897		235,922
Product Sales [Member] | Non-U.S. Government [Member]
Disaggregation of revenue [Abstract]
Total revenues	10,178		19,924
Contract Manufacturing [Member]
Disaggregation of revenue [Abstract]
Total revenues	23,613	16,160	49,791	33,788
Contract Manufacturing [Member] | U.S. Government [Member]
Disaggregation of revenue [Abstract]
Total revenues	0		0
Contract Manufacturing [Member] | Non-U.S. Government [Member]
Disaggregation of revenue [Abstract]
Total revenues	23,613		49,791
Contracts and Grants [Member]
Disaggregation of revenue [Abstract]
Total revenues	16,512	$ 21,002	32,377	$ 38,263
Contracts and Grants [Member] | U.S. Government [Member]
Disaggregation of revenue [Abstract]
Total revenues	15,250		30,055
Contracts and Grants [Member] | Non-U.S. Government [Member]
Disaggregation of revenue [Abstract]
Total revenues	$ 1,262		$ 2,322