Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 28, 2013	Dec. 29, 2012
Current assets:
Cash and cash equivalents	$ 116,539	$ 105,426
Short-term investments	153,857	176,565
Accounts receivable, net of allowances for doubtful accounts of $717 at September 28, 2013 and $670 at December 29, 2012	68,499	78,023
Inventories	44,817	49,579
Deferred income taxes	17,356	16,652
Prepaid expenses and other current assets	51,097	41,437
Total current assets	452,165	467,682
Long-term investments	10,671	11,369
Property and equipment, net	134,398	135,271
Goodwill	227,289	130,265
Other intangible assets, net	136,054	90,750
Other assets, net	39,150	36,629
Total assets	999,727	871,966
Current liabilities:
Accounts payable	24,885	29,622
Current portion of long-term debt	5,000	5,000
Accrued expenses	42,639	40,410
Deferred income on shipments to distributors	29,876	30,259
Income taxes	1,457	1,087
Total current liabilities	103,857	106,378
Long-term debt	91,250	95,000
Other non-current liabilities	70,342	20,615
Total liabilities	265,449	221,993
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; 43,093 and 41,879 shares issued and outstanding at September 28, 2013 and December 29, 2012, respectively	4	4
Additional paid-in capital	55,085	10,122
Retained earnings	679,970	640,793
Accumulated other comprehensive loss	(781)	(946)
Total stockholders' equity	734,278	649,973
Total liabilities and stockholders' equity	$ 999,727	$ 871,966