Segment Information - Segment Assets (Detail) (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 02, 2015	Apr. 04, 2014
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 2,153,324	$ 1,960,115
Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	560,782	509,685
Operating Segments [Member] | Satellite Services [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	73,059	73,382
Operating Segments [Member] | Commercial Networks [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	222,885	229,455
Operating Segments [Member] | Government Systems [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	264,838	206,848
Corporate, Non-Segment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 1,592,542	$ 1,450,430