Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jul. 03, 2011	Jul. 04, 2010	Jul. 03, 2011	Jul. 04, 2010
Consolidated Statements of Operations [Abstract]
Revenues	$ 536,251	$ 410,563	$ 997,879	$ 794,987
Cost of sales	(379,637)	(293,259)	(710,810)	(567,273)
Gross profit	156,614	117,304	287,069	227,714
Selling, general and administrative expenses	(84,380)	(68,407)	(159,316)	(137,142)
Research and development	(14,530)	(9,911)	(28,159)	(20,219)
Amortization of intangibles	(3,347)	(2,587)	(7,026)	(5,300)
Income from equity method investment	3,855	3,211	7,717	5,852
Operating income	58,212	39,610	100,285	70,905
Interest expense	(12,748)	(14,186)	(24,556)	(27,132)
Interest income	156	136	315	318
Other income	0	1,465	0	1,465
Income (loss) from continuing operations before taxes	45,620	27,025	76,044	45,556
Income tax benefit (expense)	(10,739)	(5,440)	(19,145)	(9,641)
Income (loss) from continuing operations	34,881	21,585	56,899	35,915
Loss from discontinued operations, net of tax	(156)	(1,913)	(284)	(4,496)
Net income (loss)	$ 34,725	$ 19,672	$ 56,615	$ 31,419
Weighted average number of common shares and equivalents:
Basic	47,401	46,779	47,304	46,737
Diluted	48,414	47,788	48,372	47,647
Basic income (loss) per share:
Continuing operations	$ 0.73	$ 0.46	$ 1.20	$ 0.77
Discontinued operations	$ 0.00	$ (0.04)	$ (0.01)	$ (0.10)
Net income	$ 0.73	$ 0.42	$ 1.19	$ 0.67
Diluted income (loss) per share:
Continuing operations	$ 0.72	$ 0.45	$ 1.18	$ 0.75
Discontinued operations	$ 0.00	$ (0.04)	$ (0.01)	$ (0.09)
Net income	$ 0.72	$ 0.41	$ 1.17	$ 0.66
Dividends declared per share	$ 0.05	$ 0.05	$ 0.10	$ 0.10