Goodwill and Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Goodwill and Intangible Assets Disclosure [Line Items]
Amortization expense	$ 1.5	$ 1.2
Anticipated future amortization expense for remainder of 2012	4.3
Anticipated future amortization expense for 2013	5.8
Anticipated future amortization expense for 2014	5.5
Anticipated future amortization expense for 2015	5.1
Anticipated future amortization expense for 2016	4.7
Curamik Electronics GmbH [Member] | Unclassified Indefinite-lived Intangible Assets [Member]
Goodwill and Intangible Assets Disclosure [Line Items]
Intangible assets	$ 5.1