CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jan. 01, 2012	Jan. 02, 2011
Cash flows provided by operating activities:
Net income	$ 45,708	$ 38,781
Adjustments:
Depreciation	14,191	13,566
Amortization of intangible assets	12,129	14,916
Other-than temporary impairment loss on investments	2,130	0
Gain from divestiture	(45,939)	0
Stock-based compensation expense	12,574	13,207
Tax benefit from share based payment arrangements	(460)	0
Deferred tax provision	49	74
Changes in assets and liabilities (net of effects of acquisitions and divestiture):
Accounts receivable, net	23,376	713
Inventories	(11,456)	(9,600)
Prepayments and other assets	886	1,445
Accounts payable	(11,727)	(1,900)
Accrued compensation and related expenses	914	7,790
Deferred income on shipments to distributors	1,234	(3,289)
Income taxes payable and receivable	1,265	1,384
Other accrued liabilities and long term liabilities	(8,242)	(5,228)
Net cash provided by operating activities	36,632	71,859
Cash flows provided by (used for) investing activities
Acquisitions, net of cash acquired	(1,957)	(6,247)
Proceeds from divestitures	51,670	0
Cash in escrow related to acquisition	0	(1,160)
Purchases of intangible assets	(5,000)	0
Purchases of property, plant and equipment	(16,917)	(7,579)
Purchase of non-marketable equity securities	0	(2,500)
Proceeds from sales of non-marketable equity securities	2,619	0
Purchases of short-term investments	(450,156)	(349,701)
Proceeds from sales of short-term investments	294,485	36,765
Proceeds from maturities of short-term investments	145,934	318,318
Net cash provided by (used for) investing activities	20,678	(12,104)
Cash flows provided by (used for) financing activities
Proceeds from issuance of common stock	11,139	9,775
Repurchases of common stock	(62,461)	(96,920)
Excess tax benefit from share based payment arrangements	460	(228)
Net cash used for financing activities	(50,862)	(87,373)
Effect of exchange rates on cash and cash equivalents	(714)	450
Net increase (decrease) in cash and cash equivalents	5,734	(27,168)
Cash and cash equivalents at beginning of period	104,680	120,526
Cash and cash equivalents at end of period	$ 110,414	$ 93,358