The following is a summary of the Company’s intangible assets as of September 30, 2018 and December 31, 2017 (in thousands):



	September 30, 2018			December 31, 2017			Weighted Average Life
Customer lists	$	74,063		$	74,615		14.4
Non-compete agreements	956			964			4.1
Trade names	2,510			2,510			13.3
Patents	57			57			9.0
	77,586			78,146
Less accumulated amortization	(67,181		)	(50,583		)
Intangible assets, net	$	10,405		$	27,563

In accordance with ASC 350, the Company amortizes its intangible assets with finite lives over their respective estimated useful lives and reviews for impairment whenever impairment indicators exist. Impairment indicators could include significant under-performance relative to the historical or projected future operating results, significant changes in the manner of use of assets, significant negative industry or economic trends or significant changes in the Company’s market capitalization relative to net book value. Any changes in key assumptions used by the Company, including those set forth above, could result in an impairment charge and such a charge could have a material adverse effect on the Company’s consolidated results of operations. The Company’s intangible assets consist of customer lists, non-compete agreements, trade names and patents. The Company’s customer lists, which have an estimated weighted-average useful life of approximately fourteen years, are being amortized using the economic life method. The Company’s non-compete agreements, trade names and patents are being amortized on a straight-line basis over their estimated weighted-average useful lives of approximately four years, thirteen years and nine years, respectively.

Amortization expense related to these intangible assets was $0.9 million and $1.2 million for the three months ended September 30, 2018 and 2017, respectively, and $3.2 million and $3.7 million for the nine months ended September 30, 2018 and 2017, respectively.

The estimated amortization expense for the remainder of 2018 and each of the next five years and thereafter is as follows (in thousands):



Remainder of 2018	$	567
2019	2,123
2020	2,022
2021	1,784
2022	1,408
Thereafter	2,501
	$	10,405

Intangible and Long-Lived Asset Impairment

During the quarter ended September 30, 2018, the Company changed its reporting units as part of a segment change, which required an interim impairment assessment. The intangible and long-lived assets associated with the reporting units assessed were also reviewed for impairment. It was determined that the fair value of intangible assets in EMEA and LATAM was less than the recorded book value of certain customer lists. Additionally, it was determined that the fair value of capitalized costs related to a legacy ERP system in EMEA was less than the recorded book value of such assets.

In the third quarter of 2018, the Company recognized a $13.8 million non-cash, intangible asset impairment charge related to certain customer lists. Of the total charge, $0.6 million related to the LATAM segment, and $13.2 million related to the EMEA segment and are included in the accumulated amortization balance above. In the third quarter of 2018, the Company also recognized a $3.0 million non-cash, long-lived asset impairment charge related to a legacy ERP system in the EMEA segment.