Goodwill and Acquired Intangibles (Tables)

6 Months Ended

Jun. 30, 2018

The changes in the carrying amount of goodwill during the six months ended June 30, 2018 were as follows:



	Gross Carrying Amount
	(In thousands)
Balance as of December 30, 2017	$	666,009
Effect of foreign currency translation	(2,689		)
Balance as of June 30, 2018	$	663,320

Acquired intangibles as of June 30, 2018 were as follows, excluding intangibles that were fully amortized as of December 30, 2017:



	Gross Carrying Amount		Accumulated Amortization			Acquired Intangibles, Net
	(In thousands)
Existing technology	$	330,756	$	(207,198	)	$	123,558
Agreements and relationships	146,466		(93,186		)	53,280
Tradenames, trademarks and patents	10,718		(7,671		)	3,047
Total acquired intangibles with definite lives	487,940		(308,055		)	179,885
In-process technology	71,500		—			71,500
Total acquired intangibles	$	559,440	$	(308,055	)	$	251,385

Acquired intangibles as of December 30, 2017 were as follows, excluding intangibles that were fully amortized as of December 31, 2016:



	Gross Carrying Amount		Accumulated Amortization			Acquired Intangibles, Net
	(In thousands)
Existing technology	$	342,810	$	(199,529	)	$	143,281
Agreements and relationships	151,063		(90,675		)	60,388
Tradenames, trademarks and patents	10,918		(7,252		)	3,666
Total acquired intangibles with definite lives	504,791		(297,456		)	207,335
In-process technology	71,500		—			71,500
Total acquired intangibles	$	576,291	$	(297,456	)	$	278,835

Amortization of acquired intangibles for the three and six months ended June 30, 2018 and July 1, 2017 was as follows:



	Three Months Ended				Six Months Ended
	June 30, 2018		July 1, 2017		June 30, 2018		July 1, 2017
	(In thousands)
Cost of product and maintenance	$	9,991	$	10,868	$	20,268	$	21,446
Amortization of acquired intangibles	3,518		3,836		7,148		7,692
Total amortization of acquired intangibles	$	13,509	$	14,704	$	27,416	$	29,138

Estimated amortization expense for acquired intangible assets with definite lives for the following five fiscal years and thereafter is as follows:



	(In thousands)
2018 – remaining period	$	25,921
2019	46,222
2020	40,614
2021	36,115
2022	17,810
Thereafter	13,203
Total estimated amortization expense	$	179,885