Segment Information - Segment Revenues and Operating Profits (Losses) (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Jan. 02, 2015	Dec. 31, 2015	Jan. 02, 2015
Segment Reporting Information [Line Items]
Product revenues	$ 156,290	$ 174,299	$ 488,298	$ 536,352
Income (loss) from operations	10,385	18,178	33,625	63,465
Operating Segments [Member]
Segment Reporting Information [Line Items]
Income (loss) from operations	14,646	22,829	47,283	76,803
Satellite Services [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Product revenues	6,453	6,149	19,105	27,468
Income (loss) from operations	21,772	10,421	59,849	47,823
Implied license [Member] | Satellite Services [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Product revenues	6,400	6,000	18,800	27,000
Implied license and other damages [Member] | Satellite Services [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Income (loss) from operations	$ 6,400	$ 6,000	$ 18,800	$ 45,700