Quarterly Financial Information (Schedule Of Quarterly Financial Information) (Details) (USD $)	3 Months Ended												6 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012		Jul. 01, 2012		Apr. 01, 2012		Dec. 31, 2011		Oct. 02, 2011	Jul. 03, 2011	Apr. 03, 2011	Jul. 01, 2012	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 216,600,000	$ 192,800,000	[1]	$ 201,000,000	[1]	$ 179,700,000	[2]	$ 236,800,000	[3]	$ 211,800,000	$ 221,100,000	$ 178,500,000			$ 790,093,000	$ 848,181,000	$ 679,111,000
Gross profit	90,900,000	80,000,000	[1]	79,200,000	[1]	65,900,000	[2]	99,300,000	[3]	87,800,000	91,300,000	68,300,000			316,040,000	346,737,000	257,592,000
Net loss	(4,800,000)	7,689,000		(43,302,000)		(242,100,000)	[2]	(21,600,000)	[3]	700,000	(3,800,000)	(6,000,000)	(285,392,000)	(277,703,000)	(282,503,000)	(30,757,000)	(5,325,000)
Basic earnings (loss)	$ (0.08)	$ 0.13		$ (0.72)		$ (4.03)	[2]	$ (0.36)	[3]	$ 0.01	$ (0.06)	$ (0.10)	$ (4.75)	$ (4.61)	$ (4.68)	$ (0.51)	$ (0.09)
Diluted earnings (loss) (in dollars per share)	$ (0.08)	$ 0.13		$ (0.72)		$ (4.03)	[2]	$ (0.36)	[3]	$ 0.01	$ (0.06)	$ (0.10)	$ (4.75)	$ (4.61)	$ (4.68)	$ (0.51)	$ (0.09)
Increase in valuation allowance	$ 20,900,000					$ 206,900,000

[1] Net (loss) earnings, basic (loss) earnings per share, and diluted (loss) earnings per share for the second and third quarters of 2012 have been corrected from amounts previously reported, as described in the section below titled "Immaterial Restatement of Goodwill Impairment."2011Q1 Q2 Q3 Q43Revenues$178.5 $221.1 $211.8 $236.8Gross profit68.3 91.3 87.8 99.3Net (loss) earnings(6.0) (3.8) 0.7 (21.6) Basic (loss) earnings per share$(0.10) $(0.06) $0.01 $(0.36)Diluted (loss) earnings per share$(0.10) $(0.06) $0.01 $(0.36)3 In the fourth quarter of 2011, we recorded an expense of $20.9 million for a valuation allowance against a portion of our U.S. deferred tax assets.

[2] In the first quarter of 2012, we recognized expense of $206.9 million for a valuation allowance against a portion of our U.S. deferred tax assets.

[3] In the fourth quarter of 2011, we recorded an expense of $20.9 million for a valuation allowance against a portion of our U.S. deferred tax assets.