Changes In Carrying Amount Of Goodwill By Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2012 High Performance Foams	Mar. 31, 2012 Curamik Electronics Solutions	Mar. 31, 2012 Other	Dec. 31, 2011 Other
Goodwill [Line Items]
Beginning Balance	$ 102,178	$ 22,597	$ 77,357	$ 2,224	$ 2,224
Foreign currency translation adjustment	2,181	360	1,821
Ending Balance	$ 104,359	$ 22,957	$ 79,178	$ 2,224	$ 2,224

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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