CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Income Statement [Abstract]
Revenues	$ 522,478	$ 465,234	$ 1,559,442	$ 1,363,052
Cost of sales	(339,637)	(326,421)	(1,030,052)	(946,792)
Gross profit	182,841	138,813	529,390	416,260
Selling, general and administrative expenses	(96,197)	(98,273)	(281,682)	(256,137)
Research and development	(21,141)	(18,812)	(62,497)	(47,434)
Amortization of intangibles	(12,326)	(7,646)	(38,408)	(13,145)
Income from equity method investment	758	2,553	5,285	7,254
Asset impairment		(29,904)		(29,904)
Operating income (loss)	53,935	(13,269)	152,088	76,894
Interest expense	(19,259)	(13,890)	(53,509)	(38,308)
Interest income	92	171	349	733
Loss on debt extinguishment		(50,585)		(50,585)
Income (loss) from continuing operations before taxes	34,768	(77,573)	98,928	(11,266)
Income tax benefit (expense)	(5,700)	21,887	(18,123)	15,024
Income (loss) from continuing operations	29,068	(55,686)	80,805	3,758
Gain on disposal of discontinued operations, net of tax		9,783		9,783
Income from discontinued operations, net of tax		7,125		14,346
Net income (loss)	29,068	(38,778)	80,805	27,887
Weighted average number of common shares and equivalents:
Basic	43,694	44,787	44,013	45,410
Diluted	44,537	44,787	44,916	46,249
Basic income (loss) per share:
Continuing operations	$ 0.67	$ (1.24)	$ 1.84	$ 0.08
Disposal of discontinued operations		$ 0.22		$ 0.21
Discontinued operations		$ 0.15		$ 0.32
Net income (loss)	$ 0.67	$ (0.87)	$ 1.84	$ 0.61
Diluted income (loss) per share:
Continuing operations	$ 0.65	$ (1.24)	$ 1.80	$ 0.08
Disposal of discontinued operations		$ 0.22		$ 0.21
Discontinued operations		$ 0.15		$ 0.31
Net income (loss)	$ 0.65	$ (0.87)	$ 1.80	$ 0.60
Comprehensive income (loss)	$ 34,776	$ (24,687)	$ 73,618	$ 24,366
Dividends declared per share	$ 0.05	$ 0.05	$ 0.15	$ 0.15