Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

The changes in the carrying amount of goodwill for the period ending December 31, 2017, by operating segment, were as follows:



(Dollars in thousands)	Advanced Connectivity Solutions		Elastomeric Material Solutions		Power Electronics Solutions		Other		Total
December 31, 2016	$	51,693	$	91,531	$	62,983	$	2,224	$	208,431
Purchase accounting adjustment	—		346		—		—		346
DSP acquisition	—		17,793		—		—		17,793
Foreign currency translation adjustment	—		1,905		8,632		—		10,537
December 31, 2017	$	51,693	$	111,575	$	71,615	$	2,224	$	237,107

The changes in the carrying amount of other intangible assets for the two-year period ending December 31, 2017, were as follows:



	December 31, 2017						December 31, 2016
(Dollars in thousands)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Customer relationships	$	128,907	$	22,514	$	106,393	$	96,148	$	14,311	$	81,837
Technology	73,891		33,491		40,400		68,880		24,365		44,515
Trademarks and patents	10,213		2,157		8,056		6,825		1,156		5,669
Covenant not to compete	1,799		1,108		691		1,419		932		487
Total definite-lived other intangible assets	214,810		59,270		155,540		173,272		40,764		132,508
Indefinite-lived other intangible asset	4,738		—		4,738		4,168		—		4,168
Total other intangible assets	$	219,548	$	59,270	$	160,278	$	177,440	$	40,764	$	136,676

The weighted average amortization period as of December 31, 2017, by definite-lived other intangible asset class, is presented in the table below:



Definite-Lived Other Intangible Asset Class	Weighted Average Amortization Period
Customer relationships	9.6
Technology	5.4
Trademarks and patents	6.5
Covenant not to compete	2.5
Total definite-lived other intangible assets	8.3