Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 25, 2012
Cash Flows from Operating Activities:
Net loss	$ (14,435)	$ (13,622)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	19,910	25,642
Gain on liquidation of auction rate securities	(1,200)	(1,059)
Provision (benefit) for deferred income taxes	(25)	126
Net gain on sale and disposal of property, plant and equipment	(592)	(163)
Asset impairment charges		2,070
Compensation recognized under employee stock plans	8,624	6,447
Changes in assets and liabilities	(5,287)	(4,508)
Net cash provided by operating activities	6,995	14,933
Cash Flows from Investing Activities:
Proceeds from liquidation of auction rate securities	1,530	1,059
Proceeds from sale of property, plant and equipment	612	4,227
Purchases of property, plant and equipment	(12,883)	(9,229)
Purchases of marketable securities	(24,024)	38,396
Proceeds from maturities of marketable securities	28,346	(34,383)
Net cash provided by (used for) investing activities	(6,419)	70
Cash Flows from Financing Activities:
Proceeds from issuance of common stock due to options exercised	620	1,269
Refinancing cost on Revolver	(114)
Payments on debt and capital lease obligations	(1,545)	(13,632)
Cash settlement on hedging activities	(268)	(268)
Net cash used for financing activities	(1,307)	(12,631)
Effect of exchange rate changes on cash and cash equivalents	286	(197)
Net increase (decrease) in cash and cash equivalents	(445)	2,175
Cash and cash equivalents, beginning of period	262,177	194,850
Cash and cash equivalents, end of period	261,732	197,025
Non-cash investing and financing activities:
Liabilities recorded for purchases of property, plant and equipment	$ 7,168	$ 2,684