Consolidated Condensed Statements Of Cash Flows (USD $) In Thousands	3 Months Ended
	Jun. 25, 2011	Jun. 26, 2010
Cash flows from operating activities:
Net income	$ 9,178	$ 17,602
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,262	1,921
Stock compensation expense	2,442	1,356
Deferred income taxes	4,981
Loss on retirement or writeoff of long-lived assets	2	53
Other non-cash charges		7
Net change in operating assets and liabilities:
Accounts receivable, net	(2,869)	(10,573)
Inventories	(6,354)	(7,019)
Other assets	(2,794)	(517)
Accounts payable and other accrued liabilities	675	6,946
Deferred income	2,901	2,073
Income taxes payable	193	54
Net cash provided by operating activities	10,617	11,903
Cash flows from investing activities:
Additions to property, equipment and software	(8,162)	(3,720)
Investments in technology	(6,095)	(307)
Purchase of marketable securities	(34,066)	(7,786)
Proceeds from sale and maturity of marketable securities	97,951	18,192
Decrease (increase) in restricted investments	31	(500)
Decrease in deposits and other assets	308	12
Net cash used in investing activities	49,967	5,891
Cash flows from financing activities:
Repurchase and retirement of common stock	(56,493)
Net proceeds from the issuance of common stock	360	12,255
Net cash provided by (used in) financing activities	(56,133)	12,255
Net increase in cash and cash equivalents	4,451	30,049
Cash and cash equivalents at beginning of period	37,039	16,109
Cash and cash equivalents at end of period	$ 41,490	$ 46,158