Condensed Consolidated Statement of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 29, 2013	Mar. 30, 2012	Apr. 01, 2011
Cash flows from operating activities:
Net cash provided by (used in) operating activities	$ 91,798	$ 141,449	$ 169,617
Cash flows from investing activities:
Purchase of property, equipment and satellites, net	(176,295)	(204,973)	(208,285)
Cash paid for patents, licenses and other assets	(25,270)	(24,049)	(15,986)
Payments related to acquisition of businesses, net of cash acquired			(13,456)
Net cash provided by (used in) investing activities	(201,565)	(229,022)	(237,727)
Cash flows from financing activities:
Proceeds from issuance of 2020 Notes	300,000	275,000
Repayment of 2016 Notes	(271,582)
Payment of debt issuance costs	(8,059)	(5,706)	(2,775)
Proceeds from line of credit borrowings		130,000	40,000
Payments on line of credit		(190,000)	(40,000)
Proceeds from issuance of common stock under equity plans	31,001	19,341	26,398
Purchase of common stock in treasury	(8,412)	(7,451)	(5,880)
Other		(1,386)
Incremental tax benefits from stock-based compensation	0	0	867
Net cash provided by (used in) financing activities	42,948	219,798	18,610
Effect of exchange rate changes on cash	(26)	(132)	359
Net increase (decrease) in cash and cash equivalents	(66,845)	132,093	(49,141)
Cash and cash equivalents at beginning of fiscal year	172,583	40,490	89,631
Cash and cash equivalents at end of fiscal year	105,738	172,583	40,490
Issuing Parent Company [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	37,754	64,191	57,877
Cash flows from investing activities:
Purchase of property, equipment and satellites, net	(46,413)	(156,874)	(152,416)
Cash paid for patents, licenses and other assets	(25,154)	(23,993)	(15,942)
Payments related to acquisition of businesses, net of cash acquired			(14,203)
Long-term intercompany notes and investments	(1,232)	2,849	(726)
Net cash provided by (used in) investing activities	(72,799)	(178,018)	(183,287)
Cash flows from financing activities:
Proceeds from issuance of 2020 Notes	300,000	275,000
Repayment of 2016 Notes	(271,582)
Payment of debt issuance costs	(8,059)	(5,706)	(2,775)
Proceeds from line of credit borrowings		130,000	40,000
Payments on line of credit		(190,000)	(40,000)
Proceeds from issuance of common stock under equity plans	31,001	19,341	26,398
Purchase of common stock in treasury	(8,412)	(7,451)	(5,880)
Other	(1,041)	(438)
Incremental tax benefits from stock-based compensation			867
Long-term intercompany financing		31,160	64,889
Net cash provided by (used in) financing activities	41,907	251,906	83,499
Net increase (decrease) in cash and cash equivalents	(68,646)	138,079	(41,911)
Cash and cash equivalents at beginning of fiscal year	162,426	24,347	66,258
Cash and cash equivalents at end of fiscal year	93,780	162,426	24,347
Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	130,299	71,869	112,029
Cash flows from investing activities:
Purchase of property, equipment and satellites, net	(128,667)	(46,922)	(54,126)
Long-term intercompany notes and investments			100
Net cash provided by (used in) investing activities	(128,667)	(46,922)	(54,026)
Cash flows from financing activities:
Other	1,041	(948)
Long-term intercompany financing		(31,160)	(66,619)
Net cash provided by (used in) financing activities	1,041	(32,108)	(66,619)
Net increase (decrease) in cash and cash equivalents	2,673	(7,161)	(8,616)
Cash and cash equivalents at beginning of fiscal year	439	7,600	16,216
Cash and cash equivalents at end of fiscal year	3,112	439	7,600
Non-Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	(820)	7,350	(19)
Cash flows from investing activities:
Purchase of property, equipment and satellites, net	(1,215)	(3,138)	(2,013)
Cash paid for patents, licenses and other assets	(116)	(56)	(44)
Payments related to acquisition of businesses, net of cash acquired			747
Long-term intercompany notes and investments			1,731
Net cash provided by (used in) investing activities	(1,331)	(3,194)	421
Cash flows from financing activities:
Proceeds from issuance of common stock under equity plans	73
Long-term intercompany financing	1,232	(2,849)	625
Net cash provided by (used in) financing activities	1,305	(2,849)	625
Effect of exchange rate changes on cash	(26)	(132)	359
Net increase (decrease) in cash and cash equivalents	(872)	1,175	1,386
Cash and cash equivalents at beginning of fiscal year	9,718	8,543	7,157
Cash and cash equivalents at end of fiscal year	8,846	9,718	8,543
Consolidation and Elimination Adjustments [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	73	(1,961)	(270)
Cash flows from investing activities:
Purchase of property, equipment and satellites, net		1,961	270
Long-term intercompany notes and investments	1,232	(2,849)	(1,105)
Net cash provided by (used in) investing activities	1,232	(888)	(835)
Cash flows from financing activities:
Proceeds from issuance of common stock under equity plans	(73)
Long-term intercompany financing	(1,232)	2,849	1,105
Net cash provided by (used in) financing activities	$ (1,305)	$ 2,849	$ 1,105