Segment Information - Segment Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Apr. 03, 2015
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 2,202,996	$ 2,158,378
Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	584,593	554,371
Operating Segments [Member] | Satellite Services [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	65,695	63,790
Operating Segments [Member] | Commercial Networks [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	230,659	217,268
Operating Segments [Member] | Government Systems [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	288,239	273,313
Corporate, Non-Segment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 1,618,403	$ 1,604,007