Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 29, 2014	Dec. 28, 2013
Current assets:
Cash and cash equivalents	$ 128,323	$ 95,800
Short-term investments	194,765	179,593
Accounts receivable, net of allowances for doubtful accounts of $767 at March 29, 2014 and $797 at December 28, 2013	64,672	72,124
Inventories	44,334	45,271
Deferred income taxes	15,203	18,878
Prepaid expenses and other current assets	40,214	47,651
Total current assets	487,511	459,317
Long-term investments	10,997	10,632
Property and equipment, net	130,829	132,445
Goodwill	228,781	228,781
Other intangible assets, net	128,453	131,593
Other assets, net	23,482	28,382
Total assets	1,010,053	991,150
Current liabilities:
Accounts payable	22,707	22,126
Current portion of long-term debt	8,750	7,500
Accrued expenses	67,745	45,975
Deferred income on shipments to distributors	32,589	30,853
Income taxes	1,330	2,693
Total current liabilities	133,121	109,147
Long-term debt	85,000	87,500
Other non-current liabilities	30,737	55,941
Total liabilities	248,858	252,588
Commitments and contingencies
Stockholders' equity:
Preferred stock - $0.0001 par value; 10,000 shares authorized; no shares issued and outstanding
Common stock - $0.0001 par value; 250,000 shares authorized; 43,433 and 42,779 shares issued and outstanding at March 29, 2014 and December 28, 2013, respectively	4	4
Additional paid-in capital	62,883	48,630
Retained earnings	698,722	690,612
Accumulated other comprehensive loss	(414)	(684)
Total stockholders' equity	761,195	738,562
Total liabilities and stockholders' equity	$ 1,010,053	$ 991,150