Restructuring (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Restructuring Reserve [Roll Forward]
Restructuring liability, beginning of period			$ 29,477,000
Restructuring charges	928,000	47,599,000	591,000	50,645,000
Payments			12,712,000
Restructuring liability, end of period	17,356,000		17,356,000
Restructuring and Related Cost, Cost Incurred to Date			122,817,000
October 2012 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges	(255,000)	0	(833,000)	0
Restructuring and Related Cost, Number of Positions Eliminated			900
Restructuring and Related Cost, Number of Positions Eliminated, Percent of Workforce			15.00%
Restructuring and Related Cost, Expected Percentage of Costs to be Settled With Cash			90.00%
Restructuring and Related Cost, Cost Incurred to Date			29,394,000
October 2012 Restructuring Plan [Member] | Minimum [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Expected Cost			30,000,000
October 2012 Restructuring Plan [Member] | Maximum [Member]
Restructuring Reserve [Roll Forward]
Restructuring and Related Cost, Expected Cost			35,000,000
October 2012 Restructuring Plan [Member] | Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Restructuring liability, beginning of period			24,439,000
Restructuring charges	(738,000)	0	(1,821,000)	0
Payments			9,590,000
Restructuring liability, end of period	13,028,000		13,028,000
Restructuring and Related Cost, Cost Incurred to Date			27,232,000
October 2012 Restructuring Plan [Member] | Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Restructuring liability, beginning of period			714,000
Restructuring charges	3,000	0	73,000	0
Payments			239,000
Restructuring liability, end of period	548,000		548,000
Restructuring and Related Cost, Cost Incurred to Date			787,000
October 2012 Restructuring Plan [Member] | Other Restructuring Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring liability, beginning of period			358,000
Restructuring charges	480,000	0	915,000	0
Payments			994,000
Restructuring liability, end of period	279,000		279,000
Restructuring and Related Cost, Cost Incurred to Date			1,375,000
Legacy Restructuring Plans
Restructuring Reserve [Roll Forward]
Restructuring charges	1,183,000	47,599,000	1,424,000	50,645,000
Restructuring and Related Cost, Cost Incurred to Date			93,423,000
Legacy Restructuring Plans | Non-cash Impairment Charges [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges	0	43,406,000	0	43,406,000
Restructuring and Related Cost, Cost Incurred to Date			60,153,000
Legacy Restructuring Plans | Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Restructuring liability, beginning of period			60,000
Restructuring charges	0	511,000	0	1,455,000
Payments			41,000
Restructuring liability, end of period	19,000		19,000
Restructuring and Related Cost, Cost Incurred to Date			19,836,000
Legacy Restructuring Plans | Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Restructuring liability, beginning of period			2,436,000
Restructuring charges	1,120,000	2,560,000	1,337,000	4,330,000
Payments			1,034,000
Restructuring liability, end of period	2,739,000		2,739,000
Restructuring and Related Cost, Cost Incurred to Date			5,543,000
Legacy Restructuring Plans | Other Restructuring Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring liability, beginning of period			1,470,000
Restructuring charges	63,000	1,122,000	87,000	1,454,000
Payments			814,000
Restructuring liability, end of period	743,000		743,000
Restructuring and Related Cost, Cost Incurred to Date			$ 7,891,000