Segment Information - Segment Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Apr. 03, 2015
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 2,336,058	$ 2,158,378
Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	553,996	554,371
Operating Segments [Member] | Satellite Services [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	59,419	63,790
Operating Segments [Member] | Commercial Networks [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	204,989	217,268
Operating Segments [Member] | Government Systems [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	289,588	273,313
Corporate, Non-Segment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 1,782,062	$ 1,604,007