Financial Statements of Parent and Subsidiary Guarantors (Details 2) (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Dec. 30, 2011	Dec. 31, 2010	Apr. 01, 2011
Cash flows from operating activities:
Net cash provided by (used in) operating activities	$ 64,965	$ 123,312
Cash flows from investing activities:
Purchase of property, equipment and satellites, net	(159,167)	(151,730)
Cash paid for patents, licenses and other assets	(17,104)	(11,524)
Payment related to acquisition of business, net of cash acquired		(13,456)	(13,500)
Net cash provided by (used in) investing activities	(176,271)	(176,710)
Cash flows from financing activities:
Proceeds from line of credit borrowings	130,000	30,000
Payments on line of credit	(20,000)	(40,000)
Proceeds from issuance of common stock under equity plans	14,369	24,391
Purchase of common stock in treasury	(6,991)	(5,505)
Payments on capital lease	(762)
Net cash provided by (used in) financing activities	116,616	8,886
Effect of exchange rate changes on cash	42	245
Net increase (decrease) in cash and cash equivalents	5,352	(44,267)
Cash and cash equivalents at beginning of period	40,490	89,631	89,631
Cash and cash equivalents at end of period	45,842	45,364	40,490
Issuing Parent Company [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	10,692	42,141
Cash flows from investing activities:
Purchase of property, equipment and satellites, net	(130,843)	(112,270)
Cash paid for patents, licenses and other assets	(17,068)	(11,470)
Payment related to acquisition of business, net of cash acquired		(14,203)
Long - term intercompany notes and investments	3,265	(2,619)
Net cash provided by (used in) investing activities	(144,646)	(140,562)
Cash flows from financing activities:
Proceeds from line of credit borrowings	130,000	30,000
Payments on line of credit	(20,000)	(40,000)
Proceeds from issuance of common stock under equity plans	14,369	24,391
Purchase of common stock in treasury	(6,991)	(5,505)
Payments on capital lease	(84)
Intercompany long-term financing	30,531	50,996
Net cash provided by (used in) financing activities	147,825	59,882
Net increase (decrease) in cash and cash equivalents	13,871	(38,539)
Cash and cash equivalents at beginning of period	24,347	66,258	66,258
Cash and cash equivalents at end of period	38,218	27,719
Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	51,853	81,364
Cash flows from investing activities:
Purchase of property, equipment and satellites, net	(28,069)	(38,001)
Long - term intercompany notes and investments		100
Net cash provided by (used in) investing activities	(28,069)	(37,901)
Cash flows from financing activities:
Payments on capital lease	(678)
Intercompany long-term financing	(30,531)	(50,901)
Net cash provided by (used in) financing activities	(31,209)	(50,901)
Net increase (decrease) in cash and cash equivalents	(7,425)	(7,438)
Cash and cash equivalents at beginning of period	7,600	16,216	16,216
Cash and cash equivalents at end of period	175	8,778
Non-Guarantor Subsidiaries [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	4,365	60
Cash flows from investing activities:
Purchase of property, equipment and satellites, net	(2,200)	(1,712)
Cash paid for patents, licenses and other assets	(36)	(54)
Payment related to acquisition of business, net of cash acquired		747
Long - term intercompany notes and investments		(195)
Net cash provided by (used in) investing activities	(2,236)	(1,214)
Cash flows from financing activities:
Intercompany long-term financing	(3,265)	2,619
Net cash provided by (used in) financing activities	(3,265)	2,619
Effect of exchange rate changes on cash	42	245
Net increase (decrease) in cash and cash equivalents	(1,094)	1,710
Cash and cash equivalents at beginning of period	8,543	7,157	7,157
Cash and cash equivalents at end of period	7,449	8,867
Consolidation and Elimination Adjustments [Member]
Cash flows from operating activities:
Net cash provided by (used in) operating activities	(1,945)	(253)
Cash flows from investing activities:
Purchase of property, equipment and satellites, net	1,945	253
Long - term intercompany notes and investments	(3,265)	2,714
Net cash provided by (used in) investing activities	(1,320)	2,967
Cash flows from financing activities:
Intercompany long-term financing	3,265	(2,714)
Net cash provided by (used in) financing activities	3,265	(2,714)
Cash and cash equivalents at beginning of period	0	0	0
Cash and cash equivalents at end of period	$ 0	$ 0