CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012	Jun. 30, 2013	Jul. 01, 2012
Revenues	$ 529,491	$ 458,218	$ 1,036,964	$ 897,818
Cost of sales	(350,295)	(313,570)	(690,415)	(620,371)
Gross profit	179,196	144,648	346,549	277,447
Selling, general and administrative expenses	(93,503)	(76,342)	(185,485)	(157,864)
Research and development	(20,931)	(14,814)	(41,356)	(28,622)
Amortization of intangibles	(13,105)	(2,415)	(26,082)	(5,499)
Income from equity method investment	2,256	1,960	4,527	4,701
Operating income	53,913	53,037	98,153	90,163
Interest expense	(18,345)	(12,499)	(34,250)	(24,418)
Interest income	149	211	257	562
Income from continuing operations before taxes	35,717	40,749	64,160	66,307
Income tax expense	(6,225)	(1,044)	(12,423)	(6,863)
Income from continuing operations	29,492	39,705	51,737	59,444
Income from discontinued operations, net of tax		2,685		7,221
Net income	29,492	42,390	51,737	66,665
Weighted average number of common shares and equivalents:
Basic	43,928	45,526	44,173	45,720
Diluted	44,790	46,305	45,107	46,623
Basic income per share:
Continuing operations	$ 0.67	$ 0.87	$ 1.17	$ 1.30
Discontinued operations		$ 0.06		$ 0.16
Net income	$ 0.67	$ 0.93	$ 1.17	$ 1.46
Diluted income per share:
Continuing operations	$ 0.66	$ 0.86	$ 1.15	$ 1.27
Discontinued operations		$ 0.06		$ 0.15
Net income	$ 0.66	$ 0.92	$ 1.15	$ 1.43
Comprehensive income	$ 23,950	$ 14,152	$ 38,842	$ 49,053
Dividends declared per share	$ 0.05	$ 0.05	$ 0.10	$ 0.10