Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income	$ 108,111	$ 136,598	$ 87,983
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,883	13,562	9,972
Stock compensation expense	23,074	21,495	12,178
Deferred income taxes	35,959	60,600	(10,154)
Loss on retirement or write-off of long-lived assets	568		23
Excess tax benefit related to the exercise of employee stock options	(8,445)	(106)
Other non-cash charges	5,760	4,792
Net change in operating assets and liabilities:
Accounts receivable, net	6,815	(25,232)	(5,055)
Inventories	49,557	(67,606)	(15,418)
Other assets	1,239	134	(9,783)
Accounts payable	(9,443)	22,423	10,469
Accrued salaries and benefits	(3,169)	3,260	1,232
Deferred income	660	(2,272)	384
Income taxes payable	9,496	263	(130)
Other accrued liabilities	(7,027)	(7,087)	1,494
Net cash provided by operating activities	228,038	160,824	83,195
Cash flows from investing activities:
Proceeds from sale of available for sale marketable securities	139,037	127,336	181,282
Purchases of available for sale marketable securities	(321,519)	(178,847)	(127,852)
Purchases of property, equipment and software	(15,058)	(52,902)	(35,948)
Acquisition of Acoustic Technologies, net of cash obtained	(20,402)
Proceeds from sale of Apex assets		22,220
Investments in technology	(2,296)	(3,009)	(6,604)
Decrease in restricted investments			5,786
(Increase) decrease in deposits and other assets	(111)	402	1,773
Net cash (used in) provided by investing activities	(220,349)	(84,800)	18,437
Cash flows from financing activities:
Issuance of common stock, net of shares withheld for taxes	5,320	12,008	4,108
Repurchase and retirement of common stock	(52,138)	(86,059)	(76,782)
Repurchase of stock to satisfy employee tax withholding obligations	(3,868)	(1,674)
Excess tax benefit related to the exercise of employee stock options	8,445	106
Net cash used in financing activities	(42,241)	(75,619)	(72,674)
Net (decrease) increase in cash and cash equivalents	(34,552)	405	28,958
Cash and cash equivalents at beginning of period	66,402	65,997	37,039
Cash and cash equivalents at end of period	31,850	66,402	65,997
Cash payments during the year for:
Income taxes	$ 2,118	$ 5,125	$ 2,268