GOODWILL AND ACQUIRED INTANGIBLES

Goodwill

The changes in the carrying amount of goodwill during fiscal 2018 and 2017 were as follows:



	Gross Carrying Amount
	(In thousands)
Balance as of December 31, 2016	$	572,764
Goodwill resulting from acquisitions	90,218
Effect of foreign currency translation	3,027
Balance as of December 30, 2017	666,009
Effect of foreign currency translation	(3,737		)
Balance as of December 29, 2018	$	662,272

Cadence completed its annual goodwill impairment test during the third quarter of fiscal 2018 and determined that the fair value of Cadence’s single reporting unit substantially exceeded the carrying amount of its net assets and that no impairment existed.

Acquired Intangibles, Net

Acquired intangibles as of December 29, 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	$	330,500	$	(225,383	)	$	105,117
Agreements and relationships	146,426		(100,211		)	46,215
Tradenames, trademarks and patents	10,718		(8,093		)	2,625
Total acquired intangibles with definite lives	487,644		(333,687		)	153,957
In-process technology	71,500		—			71,500
Total acquired intangibles	$	559,144	$	(333,687	)	$	225,457

In-process technology as of December 29, 2018 consisted of acquired projects that, if completed, will contribute to Cadence’s design IP offerings. As of December 29, 2018, these projects were expected to be completed in approximately three to twelve months. During fiscal 2018, there were no transfers from in-process technology to existing technology.

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 expense from existing technology and maintenance agreements is included in cost of product and maintenance. Amortization expense for fiscal 2018, 2017 and 2016, by consolidated income statement caption, was as follows:



	2018		2017		2016
	(In thousands)
Cost of product and maintenance	$	39,247	$	41,781	$	42,387
Amortization of acquired intangibles	14,086		14,716		18,095
Total amortization of acquired intangibles	$	53,333	$	56,497	$	60,482

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



	(In thousands)
2019	$	46,217
2020	40,612
2021	36,115
2022	17,810
2023	5,325
Thereafter	7,878
Total estimated amortization expense	$	153,957