Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in carrying amount of goodwill

	2020
Goodwill balance at January 1	$	353,193
Effect of foreign exchange		(215)
Additions and adjustments as the result of acquisitions		115
Goodwill balance at June 30	$	353,093

Other intangible assets

Other intangible assets at June 30, 2020 and December 31, 2019 consisted of the following (in thousands):

	June 30, 2020
	Gross Carrying		Accumulated		Net Carrying
	Amount		Amortization		Amount
Patents	$	24,492	$	(7,863)	$	16,629
Distribution agreements		5,754		(4,723)		1,031
License agreements		21,957		(8,698)		13,259
Trademarks		30,242		(10,936)		19,306
Customer lists		34,698		(27,706)		6,992
In-process technology		2,500		—		2,500
Total	$	119,643	$	(59,926)	$	59,717

	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 June 30, 2020 (in thousands):

Year Ending December 31,	Estimated Amortization Expense
Remaining 2020	$	29,180
2021		51,348
2022		50,225
2023		49,090
2024		46,276