CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2016	Oct. 04, 2015	Oct. 02, 2016	Oct. 04, 2015
Revenues:
Products	$ 334,610	$ 386,488	$ 1,149,581	$ 1,096,056
Services	75,865	79,506	223,680	225,077
Total revenues	410,475	465,994	1,373,261	1,321,133
Cost of revenues:
Cost of products	148,266	170,963	531,616	471,450
Cost of services	34,850	36,405	101,084	100,067
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)	183,116	207,368	632,700	571,517
Gross profit	227,359	258,626	740,561	749,616
Operating expenses:
Engineering and development	71,400	74,027	220,973	221,309
Selling and administrative	78,794	77,481	239,393	226,595
Acquired intangible assets amortization	8,487	20,053	44,725	49,119
Acquired intangible assets impairment			83,339
Goodwill impairment			254,946
Restructuring and other	12,177	261	16,372	(124)
Total operating expenses	170,858	171,822	859,748	496,899
Income (loss) from operations	56,501	86,804	(119,187)	252,717
Non-operating (income) expense:
Interest income	(2,892)	(1,708)	(6,201)	(5,198)
Interest expense	633	508	2,034	1,114
Other (income) expense, net	(921)	596	(1,075)	(5,180)
Income (loss) before income taxes	59,681	87,408	(113,945)	261,981
Income tax (benefit) provision	(4,113)	15,955	(4,178)	54,863
Net income (loss)	$ 63,794	$ 71,453	$ (109,767)	$ 207,118
Net income (loss) per common share:
Basic	$ 0.32	$ 0.34	$ (0.54)	$ 0.97
Diluted	$ 0.31	$ 0.34	$ (0.54)	$ 0.96
Weighted average common shares-basic	202,211	210,032	203,167	213,688
Weighted average common shares-diluted	203,929	211,736	203,167	215,348
Cash dividend declared per common share	$ 0.06	$ 0.06	$ 0.18	$ 0.18