Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 30, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net income	$ 14,881	$ 24,128
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	71,762	61,980
Amortization of intangible assets	17,476	14,628
Deferred income taxes	(7,385)	246
Stock-based compensation expense	14,778	12,690
Loss on disposition of fixed assets	3,697	4,895
Other non-cash adjustments	892	943
Increase (decrease) in cash resulting from changes in operating assets and liabilities, net of effect of acquisition
Accounts receivable	6,531	1,901
Inventories	(28,197)	(11,273)
Other assets	(13,075)	(422)
Accounts payable	(6,682)	(6,112)
Accrued liabilities	(10,940)	17,124
Other liabilities	1,227	2,584
Net cash provided by 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)
Net cash 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 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
Cash and cash equivalents at end of period	45,842	45,364
Non-cash investing and financing activities:
Issuance of common stock in satisfaction of certain accrued employee compensation liabilities	6,340	5,096
Issuance of common stock in connection with acquisition		4,630
Equipment acquired under capital lease		$ 2,751