Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 30, 2012
Current assets:
Cash and cash equivalents	$ 261,732	$ 262,177
Short-term investments	47,398	51,720
Accounts receivable, net	106,602	106,864
Inventories	179,648	182,192
Deferred income taxes	8,663	8,699
Prepaid expenses and other current assets	39,045	28,531
Total current assets	643,088	640,183
Property, plant and equipment, net	170,823	176,728
Intangible assets, net	141,670	149,153
Goodwill	166,688	166,931
Other assets	32,105	39,171
Total assets	1,154,374	1,172,166
Current liabilities:
Accounts payable	70,794	85,542
Accrued compensation and benefits	19,993	26,080
Other accrued liabilities	33,658	29,913
Income taxes payable	2,919	2,618
Deferred income	10,996	9,135
Current portion of long-term debt	11,626	5,382
Total current liabilities	149,986	158,670
Deferred income taxes	9,289	9,393
Long-term debt, less current portion	403,352	410,913
Other long-term liabilities	31,429	31,416
Total liabilities	594,056	610,392
Stockholders’ equity:
Preferred stock, $0.001 par value, 50,000,000 shares authorized, 0 shares issued and outstanding	0	0
Additional paid-in capital	700,134	690,891
Accumulated deficit	(142,126)	(127,691)
Accumulated other comprehensive income (loss) (Note 4)	2,251	(1,484)
Total liabilities and stockholders' equity	1,154,374	1,172,166
Common Class A [Member]
Stockholders’ equity:
Common stock	59	58
Common Class B [Member]
Stockholders’ equity:
Common stock	$ 0	$ 0