Restructuring and Impairment Charges (Restructuring and Impairment Charges) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013		Sep. 30, 2014	Sep. 30, 2013
Restructuring Costs and Asset Impairment Charges [Abstract]
Restructuring cost		$ 1,231		$ 0	$ 5,756
Employee Severance [Member]
Cost of Revenue [Abstract]
Union ratification bonus		0			368
Restructuring Costs and Asset Impairment Charges [Abstract]
Restructuring charges		1,231			5,756
Employee Severance [Member] | Printed Circuit Materials [Member]
Cost of Revenue [Abstract]
Union ratification bonus		0			179
Restructuring Costs and Asset Impairment Charges [Abstract]
Restructuring charges		93	[1]		802	[1]
Employee Severance [Member] | High Performance Foams [Member]
Cost of Revenue [Abstract]
Union ratification bonus		0			181
Restructuring Costs and Asset Impairment Charges [Abstract]
Restructuring charges		94	[1]		1,345	[1]
Employee Severance [Member] | Power Electronics Solutions [Member]
Cost of Revenue [Abstract]
Union ratification bonus		0			8
Restructuring Costs and Asset Impairment Charges [Abstract]
Restructuring charges		1,031	[1]		3,494	[1]
Employee Severance [Member] | Other [Member]
Restructuring Costs and Asset Impairment Charges [Abstract]
Restructuring charges		13	[1]		115	[1]
Curtailment Charge [Member] | Streamlining and Restructuring Related Activities [Member]
Restructuring Costs and Asset Impairment Charges [Abstract]
Restructuring cost					$ 1,500

[1] For the nine month periods ended September 30, 2013, this includes a pension curtailment charge of $1.5 million. See Note 8 - "Pension Benefit and Other Post Retirement Plans" for further information.