Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
	Sep. 30, 2011	Oct. 01, 2010
Cash flows from operating activities:
Net income	$ 9,763	$ 11,201
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	48,000	40,983
Amortization of intangible assets	11,907	9,720
Deferred income taxes	(3,388)	6,220
Stock-based compensation expense	8,979	8,313
Loss on disposition of fixed assets	2,913	2,916
Other non-cash adjustments	782	777
Increase (decrease) in cash resulting from changes in operating assets and liabilities, net of effect of acquisition
Accounts receivable	(7,416)	6,018
Inventories	(20,582)	(3,743)
Other assets	(13,902)	3,550
Accounts payable	(6,270)	(2,067)
Accrued liabilities	(7,117)	9,768
Other liabilities	117	2,430
Net cash provided by operating activities	23,786	96,086
Cash flows from investing activities:
Purchase of property, equipment and satellites, net	(133,313)	(109,518)
Cash paid for patents, licenses and other assets	(8,295)	(8,427)
Payment related to acquisition of business, net of cash acquired		(13,456)
Net cash used in investing activities	(141,608)	(131,401)
Cash flows from financing activities:
Proceeds from line of credit borrowings	130,000	15,000
Payments on line of credit	(20,000)	(30,000)
Proceeds from issuance of common stock under equity plans	6,167	16,234
Purchase of common stock in treasury	(2,250)	(1,884)
Payments on capital lease	(465)
Net cash provided by (used in) financing activities	113,452	(650)
Effect of exchange rate changes on cash	(113)	115
Net decrease in cash and cash equivalents	(4,483)	(35,850)
Cash and cash equivalents at beginning of period	40,490	89,631
Cash and cash equivalents at end of period	36,007	53,781
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		$ 2,704