Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets

The changes in the carrying amount of other intangible assets for the two-year period ending December 31, 2016, were as follows:

	December 31, 2016						December 31, 2015
(Dollars in thousands)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Trademarks and patents	$	6,825	$	1,156	$	5,669	$	2,543	$	718	$	1,825
Developed technology	68,880		24,365		44,515		47,724		19,681		28,043
Covenant-not-to-compete	1,419		932		487		943		943		—
Customer relationships	96,148		14,311		81,837		49,948		9,100		40,848
Total definite lived intangible assets	173,272		40,764		132,508		101,158		30,442		70,716
Indefinite lived intangible assets	4,168		—		4,168		4,303		—		4,303
Total intangible assets	$	177,440	$	40,764	$	136,676	$	105,461	$	30,442	$	75,019

Weighted average amortization period, by intangible asset class

The weighted average amortization period as of December 31, 2016, by intangible asset class, is presented in the table below:

Intangible Asset Class	Weighted Average Amortization Period
Trademarks and patents	3.4
Developed technology	5.0
Customer relationships	7.7
Covenant not to compete	2.5
Total other intangible assets	6.6

Changes in the carrying amount of goodwill, by segment

The changes in the carrying amount of goodwill for the period ending December 31, 2016, by reportable segment, were as follows:

(Dollars in thousands)	Advanced Connectivity Solutions			Elastomeric Material Solutions			Power Electronics Solutions			Other		Total
December 31, 2015	$	51,931		$	56,269		$	65,029		$	2,224	$	175,453
Arlon adjustment	(238		)	—			—			—		(238		)
DeWAL acquisition	—			35,638			—			—		35,638
Foreign currency translation adjustment	—			(376		)	(2,046		)	—		(2,422		)
December 31, 2016	$	51,693		$	91,531		$	62,983		$	2,224	$	208,431