Goodwill and other intangible assets (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill, by Reporting Segment

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

	Americas		EMEA		Asia		OEM		Total
	(Dollars in thousands)
Balance as of December 31, 2017
Goodwill	$	1,859,089	$	494,548	$	209,200	$	4,883	$	2,567,720
Accumulated impairment losses	(332,128)		—		—		—		(332,128)
	1,526,961		494,548		209,200		4,883		2,235,592
Goodwill related to acquisitions	29,345		4,730		6,590		—		40,665
Translation and other adjustments	(6,772)		(18,663)		(4,243)		—		(29,678)
Balance as of December 31, 2018	1,549,534		480,615		211,547		4,883		2,246,579
Goodwill related to acquisitions	439		189		1,205		—		1,833
Translation and other adjustments	952		(5,032)		973		—		(3,107)
Balance as of December 31, 2019	$	1,550,925	$	475,772	$	213,725	$	4,883	$	2,245,305

Components of Intangible Assets

Intangible assets at December 31, 2019 and 2018 consisted of the following:

	Gross Carrying Amount				Accumulated Amortization
	2019		2018		2019		2018
	(Dollars in thousands)
Customer relationships	$	1,021,852	$	1,030,194	$	(367,585)	$	(322,972)
In-process research and development	27,940		28,457		—		—
Intellectual property	1,351,990		1,363,516		(402,340)		(322,539)
Distribution rights	23,369		23,465		(18,859)		(17,860)
Trade names	563,315		565,070		(50,718)		(36,379)
Non-compete agreements	22,618		23,004		(15,297)		(8,904)
	$	3,011,084	$	3,033,706	$	(854,799)	$	(708,654)

Estimated Annual Amortization Expense

Amortization expense related to intangible assets was $150.0 million, $149.5 million, and $98.8 million for the years ended December 31, 2019, 2018 and 2017, respectively. Estimated annual amortization expense for each of the five succeeding years is as follows:

	(Dollars in thousands)
2020	$	148,800
2021	147,200
2022	142,600
2023	141,600
2024	139,500