Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill by Segment (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Goodwill [Roll Forward]
Beginning Balance	$ 105,041
Foreign currency translation adjustment	(2,041)
Ending Balance	103,000
High Performance Foams [Member]
Goodwill [Roll Forward]
Beginning Balance	23,973
Foreign currency translation adjustment	(1,140)
Ending Balance	22,833
Printed Circuit Materials [Member]
Goodwill [Roll Forward]
Beginning Balance	0
Foreign currency translation adjustment	0
Ending Balance	0
Curamik Electronics Solutions [Member]
Goodwill [Roll Forward]
Beginning Balance	78,844
Foreign currency translation adjustment	(901)
Ending Balance	77,943
Power Electronics Solutions [Member]
Goodwill [Roll Forward]
Beginning Balance	0
Foreign currency translation adjustment	0
Ending Balance	0
Other [Member]
Goodwill [Roll Forward]
Beginning Balance	2,224
Foreign currency translation adjustment	0
Ending Balance	$ 2,224