Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Definite Lived Intangible Assets

(Dollars in thousands)	March 31, 2014						December 31, 2013
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Trademarks and patents	$	1,064	$	317	$	747	$	1,075	$	303	$	772
Technology	37,852		14,406		23,446		37,825		13,340		24,485
Covenant-not-to-compete	1,041		675		366		1,056		628		428
Customer relationships	21,240		3,577		17,663		21,280		3,235		18,045
Total definite lived intangible assets	$	61,197	$	18,975	$	42,222	$	61,236	$	17,506	$	43,730

Weighted Average Amortization Period, by Intangible Asset Class

The weighted average amortization period as of March 31, 2014, by intangible asset class, is presented in the table below:

Intangible Asset Class	Weighted Average Amortization Period
Trademarks and patents	4.1
Technology	7.1
Covenant not-to-compete	1.5
Customer relationships	7.0
Total other intangible assets	5.4

Changes in the Carrying Amount of Goodwill, by Segment

The changes in the carrying amount of goodwill for the period ending March 31, 2014, by reportable segment, is as follows:

(Dollars in thousands)	High Performance Foams			Printed Circuit Materials		Power Electronics Solutions		Other		Total
December 31, 2013	$	24,205		$	—	$	82,242	$	2,224	$	108,671
Foreign currency translation adjustment	(237		)	—		124		—		(113		)
March 31, 2014	$	23,968		$	—	$	82,366	$	2,224	$	108,558