Quarterly Financial Data (unaudited) - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended					6 Months Ended	9 Months Ended		12 Months Ended				18 Months Ended
	Mar. 27, 2015	Dec. 31, 2015	Oct. 04, 2015	Jul. 04, 2015	Mar. 31, 2015	Sep. 28, 2014	Oct. 04, 2015	Dec. 31, 2015	[1]	Mar. 31, 2015	[1]	Mar. 31, 2014	[1]	Sep. 28, 2014
Results by operating segment
Damages paid, value	$ 25,000
Goodwill impairment				$ 0	$ 34,300			$ 0	[2]	$ 34,300	[2]	$ 3,700	[2]
Loss on extinguishment of debt	$ (26,626)			$ 0	$ (26,626)	$ 0		0	[2]	(26,626)	[2]	0	[2]	$ 0
Gain on settlement			$ 50,000				$ 50,000	$ 50,000		$ 0		$ 0
Orbital Sciences Corporation
Results by operating segment
Payments for merger related costs		$ 34,900

[1] See Note 2 - Restatement

[2] See Note 2 - Restatement