
10.	Goodwill and Intangible Assets

For purposes of performing our goodwill impairment analysis, we have identified our reporting units as North America, Latin America, Coatings, EMEA and APAC. As of December 31, 2018, 2017 and 2016, we performed an analysis of qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the quantitative goodwill impairment test. Based on our analysis of qualitative factors, we determined that it was not more likely than not that the fair value of the North America, Latin America, EMEA and APAC reporting units was less than its respective carrying amount. We elected to perform a quantitative analysis of the Coatings reporting unit. Based on the quantitative analysis of that reporting unit, it was determined there was no goodwill impairment at December 31, 2018.

The changes in the carrying amount of Goodwill are as follows:



	Goodwill			Accumulated Impairment Losses			Total
Balance as of December 31, 2016	$	58,397		$	(37,332	)	$	21,065
Additions	147,845			—			147,845
Purchase accounting adjustments	(1,865		)	—			(1,865		)
Foreign currency fluctuations	22,847			(3,848		)	18,999
Balance as of December 31, 2017	$	227,224		$	(41,180	)	$	186,044
Additions	—			—			—
Purchase accounting adjustments	4,627			—			4,627
Foreign currency fluctuations	(10,141		)	2,142			(8,000		)
Balance as of December 31, 2018	$	221,710		$	(39,038	)	$	182,671

The balances of acquired Intangible Assets, excluding Goodwill, as of December 31, are as follows:



	Customer Lists			Trade Names			Technology			Total
Balance as of December 31, 2018
Original cost	$	143,059		$	30,592		$	17,436		$	191,087
Accumulated amortization	(33,714		)	(5,327		)	(5,500		)	(44,541		)
Carrying amount	$	109,345		$	25,265		$	11,936		$	146,546
Weighted-average original life (in years)	15			10			10

Balance as of December 31, 2017
Original cost	$	149,355		$	31,968		$	14,589		$	195,912
Accumulated amortization	(17,870		)	(2,436		)	(3,259		)	(23,565		)
Carrying amount	$	131,485		$	29,532		$	11,330		$	172,347
Weighted-average original life (in years)	15			10			11

The purchase accounting adjustments recorded during the first quarter of 2018 were based on the fair value adjustments related to our acquisition of the IPC Group, as described further in Note 7.

In 2018, our purchased intangible assets were $2,775, which was primarily due to a technology license. The license was recorded in Intangible Assets, Net as technology on the Condensed Consolidated Balance Sheets as of December 31, 2018.

Amortization expense on Intangible Assets was $22,129, $17,054 and $409 for the years ended December 31, 2018, 2017 and 2016, respectively.

Estimated aggregate amortization expense based on the current carrying amount of amortizable Intangible Assets for each of the five succeeding years is as follows:



2019	$	21,297
2020	19,873
2021	18,092
2022	15,913
2023	14,352
Thereafter	57,019
Total	$	146,546