Goodwill and Other Intangibles

12 Months Ended

Dec. 31, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Note 7 — Goodwill and Other Intangibles

Goodwill

Changes in the carrying amount of goodwill, by reportable segment, for the years ended December 31, 2020 and 2019 were as follows:

	Automotive			Medical		Total
December 31, 2018	$	37,533		$	17,778	$	55,311
Stihler acquisition		—			9,816		9,816
Exchange rate impact		(595	)		40		(555	)
Balance as of December 31, 2019	$	36,938		$	27,634	$	64,572
Exchange rate impact		2,557			895		3,452
Balance as of December 31, 2020	$	39,495		$	28,529	$	68,024

Other Intangible Assets

Other intangible assets and accumulated amortization balances as of December 31, 2020 and 2019 were as follows:

	Gross Carrying Value		Accumulated Amortization			Net Carrying Value
Definite-lived:
Customer relationships	$	97,815	$	(63,432	)	$	34,383
Technology		30,615		(24,075	)		6,540
Product development costs		22,164		(21,336	)		828
Indefinite-lived:
Tradenames		4,670		—			4,670
Balance as of December 31, 2020	$	155,264	$	(108,843	)	$	46,421

	Gross Carrying Value		Accumulated Amortization			Net Carrying Value
Definite-lived:
Customer relationships	$	89,208	$	(50,687	)	$	38,521
Technology		25,106		(19,866	)		5,240
Product development costs		19,911		(18,559	)		1,352
Indefinite-lived:
Tradenames		4,670		—			4,670
Balance as of December 31, 2019	$	138,895	$	(89,112	)	$	49,783

On February 28, 2020, Gentherm acquired the automotive patents and technology of a development-stage technology company for $3,141. The investment was accounted for as an asset acquisition of defensive intangible assets and will be amortized over six years.

On June 19, 2020, Gentherm sold patents from a non-core business for $2,055. The gain on sale of $1,978 was recorded in Other income in the consolidated statements of income.

In connection with the acquisition of Stihler, the Company recorded intangible assets including customer relationships and technology of $3,420 and $538, respectively. These definite-lived assets are being amortized using the straight-line method over their estimated useful lives of approximately 9 years and 7 years, respectively.

A total of $9,226, $10,068 and $14,043 in other intangible assets were amortized in 2020, 2019 and 2018, respectively.

An estimate of other intangible asset amortization by year, is as follows:

2021	$	8,316
2022		7,803
2023		4,385
2024		3,245
2025		3,229

Impairment Charges

During 2018, Gentherm determined GPT and CSZ-IC met the held for sale criteria, described above, and recorded an impairment loss on assets held for sale, goodwill and other intangible assets of $2,190, $6,151 and $3,135, respectively.