Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Oct. 02, 2011	Oct. 03, 2010	Oct. 02, 2011	Oct. 03, 2010
Consolidated Statements of Operations [Abstract]
Revenues	$ 519,713	$ 396,927	$ 1,517,592	$ 1,191,914
Cost of sales	(366,962)	(278,743)	(1,077,772)	(846,016)
Gross profit	152,751	118,184	439,820	345,898
Selling, general and administrative expenses	(85,355)	(66,164)	(244,671)	(203,306)
Research and development	(13,641)	(10,887)	(41,800)	(31,106)
Amortization of intangibles	(3,371)	(2,600)	(10,397)	(7,900)
Income from equity method investment	1,479	3,053	9,196	8,905
Operating income	51,863	41,586	152,148	112,491
Interest expense	(11,690)	(11,778)	(36,246)	(38,910)
Interest income	211	80	526	398
Other income				1,465
Income (loss) from continuing operations before taxes	40,384	29,888	116,428	75,444
Income tax expense	(9,019)	(7,244)	(28,164)	(16,885)
Income (loss) from continuing operations	31,365	22,644	88,264	58,559
Loss from discontinued operations, net of tax	(162)	(2,039)	(446)	(6,535)
Net income (loss)	$ 31,203	$ 20,605	$ 87,818	$ 52,024
Weighted average number of common shares and equivalents:
Basic	47,344	46,813	47,317	46,762
Diluted	48,244	47,721	48,329	47,665
Basic income (loss) per share:
Continuing operations	$ 0.66	$ 0.48	$ 1.87	$ 1.25
Discontinued operations		$ (0.04)	$ (0.01)	$ (0.14)
Net Income	$ 0.66	$ 0.44	$ 1.86	$ 1.11
Diluted income (loss) per share:
Continuing operations	$ 0.65	$ 0.47	$ 1.83	$ 1.23
Discontinued operations		$ (0.04)	$ (0.01)	$ (0.14)
Net Income	$ 0.65	$ 0.43	$ 1.82	$ 1.09
Dividends declared per share	$ 0.05	$ 0.05	$ 0.15	$ 0.15