Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in carrying amount of goodwill

	2021
Goodwill balance at January 1	$	363,533
Effect of foreign exchange		(723)
Goodwill balance at June 30	$	362,810

Other intangible assets

Other intangible assets at June 30, 2021 and December 31, 2020 consisted of the following (in thousands):

	June 30, 2021
	Gross Carrying		Accumulated		Net Carrying
	Amount		Amortization		Amount
Patents	$	25,036	$	(7,358)	$	17,678
Distribution agreements		3,250		(2,419)		831
License agreements		12,710		(7,198)		5,512
Trademarks		30,260		(13,865)		16,395
Customer lists		35,058		(30,153)		4,905
Total	$	106,314	$	(60,993)	$	45,321

	December 31, 2020
	Gross Carrying		Accumulated		Net Carrying
	Amount		Amortization		Amount
Patents	$	23,669	$	(6,460)	$	17,209
Distribution agreements		3,250		(2,319)		931
License agreements		14,453		(6,647)		7,806
Trademarks		30,273		(12,414)		17,859
Customer lists		35,154		(29,103)		6,051
Total	$	106,799	$	(56,943)	$	49,856

Estimated amortization expense

Estimated amortization expense for the developed technology and other intangible assets for the next five years consisted of the following as of June 30, 2021 (in thousands):

Year Ending December 31,	Estimated Amortization Expense
Remaining 2021	$	24,572
2022		48,149
2023		47,050
2024		44,113
2025		42,335