Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Sep. 30, 2012 Minimum	Sep. 30, 2012 Maximum	Sep. 30, 2012 Curamik Electronics GmbH	Jan. 04, 2011 Curamik Electronics GmbH	Jan. 04, 2011 Curamik Electronics GmbH Unclassified Indefinite-lived Intangible Assets
Goodwill and Intangible Assets Disclosure [Line Items]
Amortization expense	$ 1,100,000	$ 1,500,000	$ 3,300,000	$ 4,400,000
Anticipated future amortization expense for remainder of 2012	1,100,000		1,100,000
Anticipated future amortization expense for 2013	5,800,000		5,800,000
Anticipated future amortization expense for 2014	5,800,000		5,800,000
Anticipated future amortization expense for 2015	5,600,000		5,600,000
Anticipated future amortization expense for 2016	5,200,000		5,200,000
Intangible assets								52,354,000	52,400,000	5,100,000
Goodwill								$ 79,837,000	$ 79,800,000
Annual Impairment Testing, Fair Value	14.60%		14.60%		55.10%
Annual Impairment Testing, Percent Decline in Operating Segment	10.00%		10.00%
Annual Impairment Testing, with Decline, Fair Value	3.10%		3.10%
Annual Impairment Discounted Cash Flow, Discount Rate	14.00%		14.00%
Annual Impairment Discounted Cash Flow, Terminal Growth Rate	3.00%		3.00%
Annual Impairment Discounted Cash Flow, Sales Growth Rate	11.00%		11.00%			0.00%	18.60%