Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2013

Intangible Assets

Definite Lived Intangible Assets

(Dollars in thousands)	March 31, 2013						December 31, 2012
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Trademarks and patents	$	1,031	$	236	$	795	$	1,065	$	227	$	838
Technology	35,527		9,285		26,242		36,479		8,394		28,085
Covenant-not-to-compete	996		405		591		1,042		358		684
Customer relationships	19,871		2,244		17,627		20,529		2,066		18,463
Total definite lived intangible assets	$	57,425	$	12,170	$	45,255	$	59,115	$	11,045	$	48,070

Weighted Average Amortization Period, by Intangible Asset Class

The weighted average amortization period as of March 31, 2013, by intangible asset class, is presented in the table below:

Intangible Asset Class	Weighted Average Amortization Period
Trademarks and patents	6.5
Technology	9.5
Covenant not-to-compete	4.0
Customer relationships	9.5
Total other intangible assets	7.7

Changes in the Carrying Amount of Goodwill, by Segment

The changes in the carrying amount of goodwill for the period ending March 31, 2013, by reportable segment, are as follows:

(Dollars in thousands)	High Performance Foams			Printed Circuit Materials		Curamik Electronics Solutions			Power Distribution Systems		Other		Total
December 31, 2012	$	23,973		$	—	$	78,844		$	—	$	2,224	$	105,041
Foreign currency translation adjustment	(733		)	—		(2,263		)	—		—		(2,996		)
March 31, 2013	$	23,240		$	—	$	76,581		$	—	$	2,224	$	102,045