Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in carrying amount of goodwill

The changes in the carrying amount of goodwill for the nine-month period ended September 30, 2018 were as follows (in thousands):

	2018
Goodwill balance at January 1	$	238,147
Effect of foreign exchange	(881)
Additions as the result of acquisitions	11,757
Goodwill balance at September 30	$	249,023

Other intangible assets

Other intangible assets at September 30, 2018 and December 31, 2017, consisted of the following (in thousands):

	September 30, 2018
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Patents	$	18,676	$	(4,665)	$	14,011
Distribution agreements	8,012		(5,509)		2,503
License agreements	24,913		(6,895)		18,018
Trademarks	21,514		(6,039)		15,475
Covenants not to compete	1,028		(993)		35
Customer lists	35,590		(21,987)		13,603
In-process technology	920		—		920
Total	$	110,653	$	(46,088)	$	64,565

	December 31, 2017
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Patents	$	16,528	$	(3,737)	$	12,791
Distribution agreements	7,262		(4,686)		2,576
License agreements	23,783		(5,568)		18,215
Trademarks	16,224		(4,686)		11,538
Covenants not to compete	1,028		(968)		60
Customer lists	31,935		(18,482)		13,453
In-process technology	920		—		920
Total	$	97,680	$	(38,127)	$	59,553

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 September 30, 2018 (in thousands):

Year Ending December 31
Remaining 2018	$	10,140
2019	39,647
2020	38,386
2021	31,025
2022	29,141