CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jul. 02, 2017	Jul. 03, 2016	Jul. 02, 2017	Jul. 03, 2016
Revenues:
Products		$ 610,356	$ 456,832	$ 983,560	$ 814,972
Services		86,545	74,960	170,254	147,815
Total revenues		696,901	531,792	1,153,814	962,787
Cost of revenues:
Cost of products		267,171	215,795	422,137	383,350
Cost of services		38,511	33,127	75,525	66,234
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)		305,682	248,922	497,662	449,584
Gross profit		391,219	282,870	656,152	513,203
Operating expenses:
Engineering and development		81,728	76,109	157,910	149,573
Selling and administrative		89,131	81,425	174,037	160,599
Acquired intangible assets amortization		8,166	16,244	16,118	36,238
Restructuring and other		2,288	2,608	4,799	4,195
Goodwill impairment			254,946		254,946
Acquired intangible assets impairment			83,339		83,339
Total operating expenses		181,313	514,671	352,864	688,890
Income (loss) from operations		209,906	(231,801)	303,288	(175,687)
Non-operating (income) expense:
Interest income		(3,292)	(1,666)	(6,812)	(3,308)
Interest expense		5,509	691	10,911	1,401
Other (income) expense, net		812	(9)	296	(155)
Income (loss) before income taxes	[1],[2]	206,877	(230,817)	298,893	(173,625)
Income tax provision (benefit)		31,901	(7,271)	38,696	(65)
Net income (loss)		$ 174,976	$ (223,546)	$ 260,197	$ (173,560)
Net income (loss) per common share:
Basic		$ 0.88	$ (1.10)	$ 1.30	$ (0.85)
Diluted		$ 0.87	$ (1.10)	$ 1.29	$ (0.85)
Weighted average common shares-basic		198,774	203,018	199,390	203,645
Weighted average common shares-diluted		201,529	203,018	201,732	203,645
Cash dividend declared per common share		$ 0.07	$ 0.06	$ 0.14	$ 0.12

[1] Included in income (loss) before taxes are charges and credits related to restructuring and other, inventory charges, goodwill impairment charges and acquired intangible assets impairment charge.

[2] Interest income, interest expense, contingent consideration adjustments, pension and postretirement plan actuarial gains and other income (expense) are included in Corporate and Eliminations.