Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	3 Months Ended
	Jul. 01, 2011	Jul. 02, 2010
Cash flows from operating activities:
Net income	$ 1,594	$ 3,400
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	24,372	20,409
Amortization of intangible assets	6,109	4,618
Deferred income taxes		1,764
Stock-based compensation expense	4,175	4,167
Loss on disposition of fixed assets	1,329	1,088
Other non-cash adjustments	253	446
Increase (decrease) in cash resulting from changes in operating assets and liabilities
Accounts receivable	14,649	14,271
Inventories	(22,591)	(5,538)
Other assets	(2,773)	4,345
Accounts payable	(3,616)	(6,540)
Accrued liabilities	(15,071)	(4,795)
Other liabilities	479	1,043
Net cash provided by operating activities	8,909	38,678
Cash flows from investing activities:
Purchase of property, equipment and satellites, net	(36,567)	(41,306)
Cash paid for patents, licenses and other assets	(4,119)	(3,851)
Net cash used in investing activities	(40,686)	(45,157)
Cash flows from financing activities:
Proceeds from line of credit borrowings	15,000
Payments on line of credit		(30,000)
Proceeds from issuance of common stock under equity plans	4,469	6,198
Purchase of common stock in treasury	(2,165)	(1,816)
Net cash provided by (used in) financing activities	17,304	(25,618)
Effect of exchange rate changes on cash	96	(203)
Net increase (decrease) in cash and cash equivalents	(14,377)	(32,300)
Cash and cash equivalents at beginning of period	40,490	89,631
Cash and cash equivalents at end of period	26,113	57,331
Non-cash investing and financing activities:
Issuance of common stock in satisfaction of certain accrued employee compensation liabilities	$ 6,340	$ 5,096