Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in carrying amount of goodwill

The changes in the carrying amount of goodwill for the years ended December 31, 2020 and 2019, are as follows (in thousands):

	2020		2019
Goodwill balance at January 1	$	353,193	$	335,433
Effect of foreign exchange		1,941		(199)
Additions and adjustments as the result of acquisitions		8,399		17,959
Goodwill balance at December 31	$	363,533	$	353,193

Other intangible assets

Other intangible assets at December 31, 2020 and 2019, consisted of the following (in thousands):

	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

	December 31, 2019
	Gross Carrying		Accumulated		Net Carrying
	Amount		Amortization		Amount
Patents	$	22,703	$	(6,863)	$	15,840
Distribution agreements		8,012		(6,794)		1,218
License agreements		26,987		(12,746)		14,241
Trademarks		30,240		(9,477)		20,763
Covenants not to compete		964		(964)		—
Customer lists		39,984		(28,763)		11,221
In-process technology		2,500		—		2,500
Total	$	131,390	$	(65,607)	$	65,783

Estimated amortization expense

Estimated amortization expense for the developed technology and other intangible assets for the next five years consists of the following as of December 31, 2020 (in thousands):

Year Ending December 31,	Estimated Amortization Expense
2021	$	49,701
2022		48,496
2023		47,323
2024		44,313
2025		42,503