CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 03, 2016	Apr. 05, 2015
Revenues:
Products	$ 358,139	$ 272,325
Services	72,855	70,076
Total revenues	430,994	342,401
Cost of revenues:
Cost of products	167,555	118,996
Cost of services	33,107	30,982
Total cost of revenues (exclusive of acquired intangible assets amortization shown separately below)	200,662	149,978
Gross profit	230,332	192,423
Operating expenses:
Engineering and development	73,464	71,450
Selling and administrative	79,174	72,041
Acquired intangible assets amortization	19,994	13,808
Restructuring and other	1,587
Total operating expenses	174,219	157,299
Income from operations	56,113	35,124
Non-operating (income) expenses:
Interest income	(1,642)	(1,816)
Interest expense	710	162
Other (income) expense, net	(147)	(5,660)
Income before income taxes	57,192	42,438
Income tax provision	7,206	9,651
Net income	$ 49,986	$ 32,787
Net income per common share:
Basic	$ 0.24	$ 0.15
Diluted	$ 0.24	$ 0.15
Weighted average common shares-basic	204,271	217,187
Weighted average common shares-diluted	205,732	218,812
Cash dividend declared per common share	$ 0.06	$ 0.06