Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill by Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Goodwill [Line Items]
Beginning Balance	$ 105,041
Foreign currency translation adjustment	(2,996)
Ending Balance	102,045
High Performance Foams [Member]
Goodwill [Line Items]
Beginning Balance	23,973
Foreign currency translation adjustment	(733)
Ending Balance	23,240
Printed Circuit Materials [Member]
Goodwill [Line Items]
Beginning Balance	0
Foreign currency translation adjustment	0
Ending Balance	0
Curamik Electronics Solutions [Member]
Goodwill [Line Items]
Beginning Balance	78,844
Foreign currency translation adjustment	(2,263)
Ending Balance	76,581
Power Electronics Solutions [Member]
Goodwill [Line Items]
Beginning Balance	0
Foreign currency translation adjustment	0
Ending Balance	0
Other [Member]
Goodwill [Line Items]
Beginning Balance	2,224
Foreign currency translation adjustment	0
Ending Balance	$ 2,224