Restructuring and Impairment Charges (Restructuring and Impairment Charges) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013		Jun. 30, 2014	Jun. 30, 2013
Restructuring Costs and Asset Impairment Charges [Abstract]
Restructuring cost		$ 4,525		$ 0	$ 4,525
Employee Severance [Member]
Cost of Revenue [Abstract]
Union ratification bonus		368			368
Restructuring Costs and Asset Impairment Charges [Abstract]
Restructuring charges		4,525			4,525
Employee Severance [Member] | Printed Circuit Materials [Member]
Cost of Revenue [Abstract]
Union ratification bonus		179			179
Restructuring Costs and Asset Impairment Charges [Abstract]
Restructuring charges		708	[1]		708	[1]
Employee Severance [Member] | High Performance Foams [Member]
Cost of Revenue [Abstract]
Union ratification bonus		181			181
Restructuring Costs and Asset Impairment Charges [Abstract]
Restructuring charges		1,253	[1]		1,253	[1]
Employee Severance [Member] | Power Electronics Solutions [Member]
Cost of Revenue [Abstract]
Union ratification bonus		8			8
Restructuring Costs and Asset Impairment Charges [Abstract]
Restructuring charges		2,463	[1]		2,463	[1]
Employee Severance [Member] | Other [Member]
Restructuring Costs and Asset Impairment Charges [Abstract]
Restructuring charges		101	[1]		101	[1]
Curtailment Charge [Member] | Streamlining and Restructuring Related Activities [Member]
Restructuring Costs and Asset Impairment Charges [Abstract]
Restructuring cost		$ 1,500			$ 1,500

[1] For the three and six month periods ended June 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.