Summarized Quarterly Data (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2012		Sep. 29, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2011		Oct. 01, 2011		Jul. 02, 2011		Apr. 02, 2011		Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 233,621		$ 200,821		$ 178,002		$ 216,730		$ 226,987		$ 215,988		$ 228,785		$ 224,323		$ 829,174		$ 896,083		$ 878,703
Gross profit	68,456		61,613		44,938		62,589		67,039		75,356		92,142		87,394		237,596		321,931		350,838
Net (loss) income	$ (3,756)		$ (11,246)		$ (13,050)		$ 1,883		$ 4,308		$ 14,838		$ 16,565		$ 12,439		$ (26,169)		$ 48,150		$ 190,837
Net (loss) income per common share:
Basic	$ (0.02)	[1]	$ (0.07)	[1]	$ (0.08)	[1]	$ 0.01	[1]	$ 0.03	[1]	$ 0.09	[1]	$ 0.10	[1]	$ 0.08	[1]	$ (0.16)	[1]	$ 0.29	[1]	$ 1.22
Diluted	$ (0.02)	[1]	$ (0.07)	[1]	$ (0.08)	[1]	$ 0.01	[1]	$ 0.03	[1]	$ 0.09	[1]	$ 0.10	[1]	$ 0.07	[1]	$ (0.16)	[1]	$ 0.28	[1]	$ 1.17

[1] Earnings per share is computed individually for each of the quarters presented; therefore, the sum of the quarterly earnings per share may not necessarily equal the total for the year.