The Company tests for impairment of goodwill and indefinite-lived intangible assets on at least an annual basis, unless significant changes in circumstances indicate a potential impairment may have occurred sooner. Such changes in circumstances may include, but are not limited to, significant changes in economic and competitive conditions, the impact of the economic environment on the Company’s customer base or its businesses, or a material negative change in its relationships with significant customers.

The Company conducted its annual goodwill impairment assessment as of October 1 for all of its reporting units, noting no impairment in continuing operations in 2018, 2017 or 2016.

During the 2018 annual review of goodwill, management performed a qualitative assessment for all of its reporting units. After considering changes to assumptions used in the most recent quantitative annual testing for each reporting unit, including macroeconomic conditions, industry and market considerations, overall financial performance, the magnitude of the excess of fair value over the carrying amount of each reporting unit as determined in the most recent quantitative annual testing, and other factors, management concluded that it was not more likely than not that the fair values of the reporting units were less than their respective carrying values and, therefore, did not perform a quantitative analysis in 2018. A qualitative analysis was also performed at October 31, 2017 and a quantitative analysis was performed at October 1, 2016.

The changes in the carrying amount of goodwill for the years ended December 31, 2018 and 2017 were as follows:

	Distribution		Material Handling			Total
January 1, 2017	$	505	$	58,714		$	59,219
Foreign currency translation		—		752			752
December 31, 2017	$	505	$	59,466		$	59,971
Foreign currency translation		—		(903	)		(903	)
December 31, 2018	$	505	$	58,563		$	59,068

Intangible assets other than goodwill primarily consist of trade names, customer relationships, patents, and technology assets established in connection with acquisitions. These intangible assets, other than certain trade names, are amortized over their estimated useful lives. The Company performs an annual impairment assessment for the indefinite lived trade names which had a carrying value of $9,782 and $9,972 at December 31, 2018 and 2017, respectively. In performing this assessment the Company uses an income approach, based primarily on Level 3 inputs, to estimate the fair value of the trade name. The Company records an impairment charge if the carrying value of the trade name exceeds the estimated fair value at the date of assessment.

			2018							2017
	Weighted Average Remaining Useful Life (years)		Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
Trade Names - Indefinite Lived			$	9,782	$	—		$	9,782	$	9,972	$	—		$	9,972
Trade Names		6.5		80		(45	)		35		80		(40	)		40
Customer Relationships		1.5		39,521		(31,896	)		7,625		41,043		(27,396	)		13,647
Technology		5.2		24,980		(12,142	)		12,838		24,980		(9,590	)		15,390
Patents		0.0		11,730		(11,730	)		—		11,730		(11,730	)		—
			$	86,093	$	(55,813	)	$	30,280	$	87,805	$	(48,756	)	$	39,049

Intangible amortization expense was $8,099, $8,378 and $9,277 in 2018, 2017 and 2016, respectively. Estimated annual amortization expense for intangible assets with finite lives for the next five years is: $7,571 in 2019; $4,819 in 2020; $2,278 in 2021; $2,278 in 2022 and $2,278 in 2023.