Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Definite Lived Intangible Assets

(Dollars in thousands)	March 31, 2015						December 31, 2014
	Gross Carrying Amount (1)		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount (1)		Accumulated Amortization		Net Carrying Amount
Trademarks and patents	$	2,583	$	432	$	2,151	$	1,046	$	364	$	682
Technology	46,481		15,639		30,842		33,942		15,958		17,984
Covenant-not-to-compete	999		856		143		1,016		823		193
Customer relationships	50,026		5,179		44,847		19,123		4,406		14,717
Total definite lived intangible assets	$	100,089	$	22,106	$	77,983	$	55,127	$	21,551	$	33,576

Weighted Average Amortization Period, by Intangible Asset Class

The weighted average amortization period as of March 31, 2015, by intangible asset class, is presented in the table below:

Intangible Asset Class	Weighted Average Amortization Period
Trademarks and patents	4.2
Technology	4.7
Covenant not-to-compete	1.0
Customer relationships	6.1
Total other intangible assets	5.5

Changes in the Carrying Amount of Goodwill, by Segment

The changes in the carrying amount of goodwill for the period ending March 31, 2015, by segment, was as follows:

(Dollars in thousands)	Printed Circuit Materials		High Performance Foams			Power Electronics Solutions			Other		Total
December 31, 2014	$	—	$	23,565		$	72,438		$	2,224	$	98,227
Foreign currency translation adjustment	—		(275		)	(8,322		)	—		(8,597		)
Arlon acquisition	51,862		33,517			—			—		85,379
March 31, 2015	$	51,862	$	56,807		$	64,116		$	2,224	$	175,009