CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	6 Months Ended
	Sep. 28, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net (loss) income	$ (22,290,000)	$ 9,763,000
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	64,359,000	48,000,000
Amortization of intangible assets	12,034,000	11,907,000
Deferred income taxes	(15,407,000)	(3,388,000)
Stock-based compensation expense	12,424,000	8,979,000
Loss on disposition of fixed assets	4,535,000	2,913,000
Other non-cash adjustments	2,370,000	782,000
Increase (decrease) in cash resulting from changes in operating assets and liabilities:
Accounts receivable	(20,515,000)	(7,416,000)
Inventories	(5,184,000)	(20,582,000)
Other assets	(5,080,000)	(13,902,000)
Accounts payable	5,404,000	(6,270,000)
Accrued liabilities	2,041,000	(7,117,000)
Other liabilities	7,396,000	117,000
Net cash provided by operating activities	42,087,000	23,786,000
Cash flows from investing activities:
Purchase of property, equipment and satellites, net	(74,652,000)	(133,313,000)
Cash paid for patents, licenses and other assets	(12,351,000)	(8,295,000)
Net cash provided by (used in) investing activities	(87,003,000)	(141,608,000)
Cash flows from financing activities:
Proceeds from issuance of common stock under equity plans	14,055,000	6,167,000
Payment of debt issuance costs	(2,215,000)	0
Purchase of common stock in treasury	(2,142,000)	(2,250,000)
Payments on capital lease	(613,000)	(465,000)
Payments of satellite performance incentives obligation	(640,000)
Proceeds from line of credit borrowings		130,000,000
Payments on line of credit		(20,000,000)
Net cash provided by (used in) financing activities	8,445,000	113,452,000
Effect of exchange rate changes on cash	6,000	(113,000)
Net decrease in cash and cash equivalents	(36,465,000)	(4,483,000)
Cash and cash equivalents at beginning of period	172,583,000	40,490,000
Cash and cash equivalents at end of period	136,118,000	36,007,000
Non-cash investing and financing activities:
Issuance of common stock in satisfaction of certain accrued employee compensation liabilities	$ 7,060,000	$ 6,340,000