Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 29, 2014
Jun. 30, 2013
Cash Flows from Operating Activities:    
Net loss $ (34,469) $ (17,666)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation and amortization 53,256 39,269
Gain on recovery of impaired investments (906) (1,200)
Provision (benefit) for deferred income taxes (78) 9
Gain on pension assets (2,494)  
Net gain on sale and disposal of property, plant and equipment (24) (957)
Loss on redemption of 7.875% Senior Unsecured Notes 1,137  
Compensation recognized under employee stock plans 15,602 16,296
Reserve reversal on final settlement of bankruptcy claims (3,205)  
Changes in assets and liabilities 18,127 (20,770)
Net cash provided by operating activities 46,946 14,981
Cash Flows from Investing Activities:    
Proceeds from recovery of impaired investments 906 1,530
Proceeds from sale of property, plant and equipment 107 934
Purchases of property, plant and equipment (22,586) (24,712)
Proceeds from sales and maturities of marketable securities 13,008 43,073
Purchases of marketable securities (23,423) (91,104)
Net cash used for investing activities (31,988) (70,279)
Cash Flows from Financing Activities:    
Proceeds from issuance of common stock due to options exercised 9,406 1,459
Refinancing cost on Term Loan and Revolver   (198)
Payments on financing arrangements (100,985) (2,105)
Net proceeds from sale of Sunnyvale property 58,908  
Cash settlement on hedging activies   (268)
Net cash used for financing activities (32,671) (1,112)
Effect of exchange rate changes on cash and cash equivalents 574 (232)
Net decrease in cash and cash equivalents (17,139) (56,642)
Cash and cash equivalents, beginning of period 286,069 262,177
Cash and cash equivalents, end of period 268,930 205,535
Purchase of Property, Plant and Equipment [Member]
   
Non-cash investing and financing activities:    
Liabilities recorded for purchases of property, plant and equipment $ 17,525 $ 11,210