Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Current:
Domestic	$ 21,084,000	$ 14,468,000	$ 10,824,000
International	(3,009,000)	2,845,000	4,145,000
Total Current	18,075,000	17,313,000	14,969,000
Deferred:
Domestic	5,444,000	(70,000)	(192,000)
International	(719,000)	(375,000)	(360,000)
Total Deferred	4,725,000	(445,000)	(552,000)
Provision for income taxes	22,800,000	16,868,000	14,417,000
Effective income tax rate reconciliation
Federal statutory rate (as a percent)	35.00%	35.00%	35.00%
Foreign tax rate benefit (as a percent)	(11.80%)	(11.00%)	(15.60%)
Research and development tax credits (as a percent)	(0.50%)	(8.50%)	(6.10%)
Release of prior year unrecognized tax benefits (as a percent)	(8.40%)		(3.60%)
Intercompany technology license (as a percent)	11.80%	10.40%	4.40%
Excess officer compensation (as a percent)	1.00%	3.20%	2.00%
Nondeductible acquisition costs (as a percent)		2.90%
Other (as a percent)	(0.70%)	0.20%	0.30%
Effective income tax rate (as a percent)	26.40%	32.20%	16.40%
Income before income taxes, related to foreign operations	5,900,000	4,100,000	40,100,000
Undistributed earnings of foreign subsidiaries	279,800,000
Deferred tax assets:
Net operating loss carryforwards	35,847,000	21,479,000
Research and development tax credit carryforwards	8,447,000	5,556,000
Stock-based compensation	8,133,000	9,963,000
Depreciation and amortization		33,334,000
Capitalized research and development	9,708,000	1,428,000
Deferred income on shipments to distributors	3,933,000	3,895,000
Accrued liabilities and other	7,503,000	7,305,000
Deferred tax assets	73,571,000	82,960,000
Less: Valuation allowance	(2,114,000)
Deferred tax assets, net	71,457,000	82,960,000
Deferred tax liabilities:
Acquired intangibles	28,653,000	18,562,000
Long term obligations for tax purposes		33,023,000
Depreciation and amortization	1,076,000
Prepaid expenses and other	1,447,000	913,000
Deferred tax liabilities	31,176,000	52,498,000
Net deferred tax assets	$ 40,281,000	$ 30,462,000