8 Goodwill and Other Intangibles

The carrying amount of goodwill was $356 million and $360 million at December 31, 2018 and 2017, respectively. During the year ended December 31, 2018, the effect of foreign currency translation decreased goodwill by $4 million.

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


	December 31, 2018						December 31, 2017
	Gross Carrying Amount		Accumulated Amortization		Weighted- Average Amortization Period		Gross Carrying Amount		Accumulated Amortization		Weighted- Average Amortization Period
Capitalized software	$	454,307	$	307,634		5 years	$	438,652	$	285,461		5 years
Purchased intangibles		201,566		144,184		11 years		169,870		138,750		11 years
Trademarks and IPR&D		13,677		—		—		13,923		—		—
Licenses		5,568		4,875		6 years		5,840		4,628		6 years
Patents and other intangibles		77,753		49,276		8 years		72,815		43,866		8 years

Total	$	752,871	$	505,969		7 years	$	701,100	$	472,705		7 years

The gross carrying value of intangible assets and accumulated amortization for intangible assets decreased by $23 million and $17 million, respectively, in the year ended December 31, 2018 due to the effects of foreign currency translation. Amortization expense for intangible assets was $50 million, $45 million and $45 million for the years ended December 31, 2018, 2017 and 2016, respectively. Amortization expense for intangible assets is estimated to be $51 million per year for each of the next five years.