Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jan. 01, 2012	Apr. 03, 2011
Current assets:
Cash and cash equivalents	$ 74,198	$ 147,780
Marketable securities	321,627	236,296
Accounts receivable, less allowance for doubtful accounts of $1,530 and $1,536 as of January 1, 2012 and April 3, 2011, respectively	82,221	70,134
Inventories	26,967	26,931
Deferred tax assets	19,954	17,754
Other current assets	13,390	20,753
Total current assets	538,357	519,648
Property and equipment, net	78,715	77,134
Goodwill	119,748	119,748
Purchased intangible assets, net	10,179	12,694
Deferred tax assets	27,284	25,333
Other assets	2,082	2,650
Total assets	776,365	757,207
Current liabilities:
Accounts payable	35,099	34,816
Accrued compensation	28,240	25,858
Accrued taxes	3,029	6,012
Deferred revenue	10,348	10,431
Other current liabilities	6,356	5,221
Total current liabilities	83,072	82,338
Accrued taxes	62,409	62,565
Deferred revenue	3,840	5,169
Other liabilities	5,922	5,971
Total liabilities	155,243	156,043
Stockholders' equity:
Preferred stock, $0.001 par value; 1,000,000 shares authorized; no shares issued and outstanding
Common stock, $0.001 par value; 500,000,000 shares authorized; 209,459,000 and 208,042,000 shares issued as of January 1, 2012 and April 3, 2011, respectively	209	208
Additional paid-in capital	877,763	844,546
Retained earnings	1,478,870	1,387,765
Accumulated other comprehensive income	299	614
Treasury stock, at cost: 110,498,000 and 103,325,000 shares as of January 1, 2012 and April 3, 2011, respectively	(1,736,019)	(1,631,969)
Total stockholders' equity	621,122	601,164
Total liabilities and stockholders' equity	$ 776,365	$ 757,207