6 Goodwill and Other Intangibles

The carrying amount of goodwill was $358 million and $360 million at September 29, 2018 and December 31, 2017, respectively. During the nine months ended September 29, 2018, the effect of foreign currency translation decreased goodwill by $2 million.

The Company’s intangible assets included in the consolidated balance sheets are detailed as follows (dollars in thousands):


	September 29, 2018						December 31, 2017
	Gross Carrying Amount		Accumulated Amortization		Weighted- Average Amortization Period		Gross Carrying Amount		Accumulated Amortization		Weighted- Average Amortization Period
Capitalized software	$	455,312	$	306,286		5 years	$	438,652	$	285,461		5 years
Purchased intangibles		203,170		143,009		11 years		169,870		138,750		11 years
Trademarks and IPR&D		13,827		—		—		13,923		—		—
Licenses		5,733		4,901		6 years		5,840		4,628		6 years
Patents and other intangibles		77,175		48,187		8 years		72,815		43,866		8 years

Total	$	755,217	$	502,383		7 years	$	701,100	$	472,705		7 years

The gross carrying value of intangible assets and accumulated amortization for intangible assets decreased by $11 million and $8 million, respectively, in the nine months ended September 29, 2018 due to the effects of foreign currency translation. Amortization expense for intangible assets was $12 million and $11 million for the three months ended September 29, 2018 and September 30, 2017, respectively. Amortization expense for intangible assets was $38 million and $33 million for the nine months ended September 29, 2018 and September 30, 2017, respectively. Amortization expense for intangible assets is estimated to be $53 million per year for each of the next five years.