Income Taxes (Details 3) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 02, 2016
Deferred Tax Assets:
Tax credit carryforwards	$ 180,999	$ 189,672
Reserves and accruals	62,438	54,774
Intangible assets	23,335	29,256
Capitalized research and development expense for income tax purposes	19,093	26,332
Operating loss carryforwards	23,175	25,208
Deferred income	14,842	16,407
Capital loss carryforwards	20,580	20,552
Stock-based compensation costs	20,087	17,612
Depreciation and amortization	12,202	22,442
Investments	6,442	7,113
Prepaid expenses	26,526	0
Total deferred tax assets	409,719	409,368
Valuation allowance	(92,920)	(91,677)
Net deferred tax assets	316,799	317,691
Deferred Tax Liabilities:
Intangible assets	(35,651)	(45,697)
Undistributed foreign earnings	(24,529)	(25,156)
Other	(119)	(1,390)
Total deferred tax liabilities	(60,299)	(72,243)
Total net deferred tax assets	$ 256,500	$ 245,448