Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Dec. 29, 2012
Current assets:
Cash and cash equivalents	$ 79,263	$ 105,426
Short-term investments	229,808	176,565
Accounts receivable, net of allowances for doubtful accounts of $673 at March 30, 2013 and $670 at December 29, 2012	72,766	78,023
Inventories	56,949	49,579
Deferred income taxes	15,411	16,652
Prepaid expenses and other current assets	48,514	41,437
Total current assets	502,711	467,682
Long-term investments	11,189	11,369
Property and equipment, net	135,761	135,271
Goodwill	130,265	130,265
Other intangible assets, net	87,910	90,750
Other assets, net	28,797	36,629
Total assets	896,633	871,966
Current liabilities:
Accounts payable	31,279	29,622
Current portion of long-term debt	5,000	5,000
Accrued expenses	36,886	40,410
Deferred income on shipments to distributors	29,661	30,259
Income taxes	978	1,087
Total current liabilities	103,804	106,378
Long-term debt	92,500	95,000
Other non-current liabilities	19,419	20,615
Total liabilities	215,723	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; 42,401 and 41,879 shares issued and outstanding at March 30, 2013 and December 29, 2012, respectively	4	4
Additional paid-in capital	20,954	10,122
Retained earnings	660,827	640,793
Accumulated other comprehensive loss	(875)	(946)
Total stockholders' equity	680,910	649,973
Total liabilities and stockholders' equity	$ 896,633	$ 871,966