Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Net sales	$ 270,253	$ 273,054	$ 814,335	$ 690,436
Cost of sales	153,943	174,311	453,402	431,673
Gross profit	116,310	98,743	360,933	258,763
Selling, general and administrative expenses	46,730	55,820	147,890	172,954
Engineering, research and development expenses	26,841	24,427	79,183	61,698
Amortization of intangible assets	11,673	13,128	35,908	24,854
Contingent consideration fair value adjustment	0	0	0	(1,282)
Operating income	31,066	5,368	97,952	539
Interest expense	9,291	10,443	28,884	23,009
Interest income	(90)	(347)	(340)	(762)
Other (income) expense, net	(5,624)	110	(8,466)	1,639
Income (loss) before income tax expense (benefit) and equity in net loss of affiliates	27,489	(4,838)	77,874	(23,347)
Income tax expense (benefit)	4,018	(3,810)	14,933	(22,012)
Equity in net loss of affiliates	68	40	218	90
Net income (loss)	$ 23,403	$ (1,068)	$ 62,723	$ (1,425)
Basic net income (loss) per common share	$ 0.17	$ (0.01)	$ 0.45	$ (0.01)
Diluted net income (loss) per common share	$ 0.17	$ (0.01)	$ 0.44	$ (0.01)
Weighted shares outstanding:
Basic	140,555	139,480	140,282	139,215
Diluted	141,317	139,480	141,016	139,215