Goodwill and Intangible Assets (Changes in Carrying Amount of Goodwill by Segment) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Goodwill [Line Items]
Beginning Balance	$ 102,178
Foreign currency translation adjustment	2,863
Ending Balance	105,041
High Performance Foams [Member]
Goodwill [Line Items]
Beginning Balance	22,597
Foreign currency translation adjustment	1,376
Ending Balance	23,973
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	77,357
Foreign currency translation adjustment	1,487
Ending Balance	78,844
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