Goodwill and Intangible Assets

Changes in goodwill during the years ended December 31, 2018 and 2017 were as follows:



(In thousands)	2018			2017
Net balance at January 1	$	422,185		$	333,276
Additions (Note 13)	—			74,453
Disposals	(525		)	—
Currency translation	(8,020		)	14,456
Net balance at December 31	$	413,640		$	422,185

At December 31, 2018, goodwill of $273.2 million and $140.4 million related to the Americas and International reporting segments, respectively.

Changes in intangible assets, net of accumulated amortization, during the years ended December 31, 2018 and 2017 were as follows:



(In thousands)	2018			2017
Net balance at January 1	$	183,088		$	77,015
Additions (Note 13)	—			110,680
Amortization expense	(10,509		)	(9,434		)
Currency translation	(3,064		)	4,827
Net balance at December 31	$	169,515		$	183,088



(In millions)		December 31, 2018							December 31, 2017
Intangible Assets:	Weighted Average Useful Life (years)	Gross Carrying Amount		Accumulated Amortization and Reserves			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization and Reserves			Net Carrying Amount
Customer relationships	14	$	46.7	$	(10.6	)	$	36.1	$	49.6	$	(7.6	)	$	42.0
Distribution agreements	20	66.1		(14.1		)	52.0		66.3		(10.9		)	55.4
Technology related assets	8	28.3		(15.5		)	12.8		28.7		(13.0		)	15.7
Patents, trademarks and copyrights	12	18.7		(10.4		)	8.3		19.2		(9.7		)	9.5
License agreements	5	5.3		(5.3		)	—		5.3		(5.3		)	—
Other	2	2.9		(2.6		)	0.3		2.9		(2.5		)	0.4
Total	15	$	168.0	$	(58.5	)	$	109.5	$	172.0	$	(49.0	)	$	123.0

During 2017, we acquired a trade name with an indefinite life totaling $60.0 million. This intangible asset is tested for impairment on October 1st of each year, or more frequently if indicators of impairment exist.

Intangible asset amortization expense over the next five years is expected to be approximately $10 million in 2019 through 2021, $9 million in 2022, and $8 million in 2023.