Segment Information - Segment Assets (Detail) (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 03, 2015	Apr. 04, 2014	Mar. 29, 2013
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 2,158,378	$ 1,960,115	$ 1,794,072
Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	554,371	509,685	503,232
Operating Segments [Member] | Satellite Services [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	63,790	73,382	89,945
Operating Segments [Member] | Commercial Networks [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	217,268	229,455	175,230
Operating Segments [Member] | Government Systems [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	273,313	206,848	238,057
Corporate, Non-Segment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 1,604,007	$ 1,450,430	$ 1,290,840