Balance Sheet Details - Selected Balance Sheet Items (Details) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2013		Dec. 29, 2012
Inventory
Raw materials	$ 12,154		$ 13,003
Work in process	45,681		57,281
Finished goods	65,670	[1]	57,525	[1]
Total	123,505		127,809
Property, plant and equipment, net:
Property, plant and equipment	213,039		197,569
Less accumulated depreciation and amortization	(133,977)		(117,226)
Total	79,062		80,343
Accrued expenses:
Loss contingency related to non-cancelable purchase commitments	3,948		5,401
Professional and other consulting fees	1,969		3,703
Taxes payable	2,642		3,588
Royalties	999		1,516
Accrued rebate and customer prepay liability	1,059		1,284
Accrued interest on convertible senior notes	875		0
Other accrued expenses	9,798		9,991
Total	21,290		25,483
Computer Hardware [Member]
Property, plant and equipment, net:
Property, plant and equipment	9,362		9,024
Computer Software [Member]
Property, plant and equipment, net:
Property, plant and equipment	16,728		15,834
Laboratory and Manufacturing Equipment [Member]
Property, plant and equipment, net:
Property, plant and equipment	143,680		120,543
Furniture and Fixtures [Member]
Property, plant and equipment, net:
Property, plant and equipment	1,348		1,285
Leasehold Improvements [Member]
Property, plant and equipment, net:
Property, plant and equipment	34,952		33,370
Construction in Progress [Member]
Property, plant and equipment, net:
Property, plant and equipment	$ 6,969		$ 17,513

[1] Included in finished goods inventory at September 28, 2013 and December 29, 2012 were $14.0 million and $12.2 million, respectively, of inventory at customer locations for which product acceptance had not occurred.