Goodwill and Other Intangibles

12 Months Ended

Dec. 31, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Note 11 — Goodwill and Other Intangibles

Goodwill

Changes in the carrying amount of goodwill, by reportable segment, for the years ended December 31, 2019 and 2018 were as follows:

	Automotive			Industrial			Total
December 31, 2017	$	38,912		$	30,773		$	69,685
Reclassifications to assets held for sale		—			(6,844	)		(6,844	)
Impairment of goodwill (a)		—			(6,151	)		(6,151	)
Exchange rate impact		(1,379	)		—			(1,379	)
December 31, 2018	$	37,533		$	17,778		$	55,311
Stihler acquisition		—			9,816			9,816
Exchange rate impact		(595	)		40			(555	)
December 31, 2019	$	36,938		$	27,634		$	64,572

See Note 4, “Acquisitions and Divestitures” for a description of the impairment of goodwill.

Other Intangible Assets

Other intangible assets and accumulated amortization balances as of December 31, 2019 and 2018 were as follows:

	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

Definite-lived:
Customer relationships	$	87,316	$	(44,269	)	$	43,047
Technology		25,110		(18,616	)		6,494
Product development costs		20,487		(18,313	)		2,174
Indefinite-lived:
Tradenames		4,670		—			4,670
Balance as of December 31, 2018	$	137,583	$	(81,198	)	$	56,385

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 $10,068, $14,043 and $12,425 in other intangible assets, including capitalized patent costs, were amortized in 2019, 2018 and 2017, respectively.

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

2020	$	8,644
2021		7,700
2022		7,225
2023		4,082
2024		3,033

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.