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Goodwill and Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Goodwill and other intangible assets that are recorded as other long-term assets    
Goodwill-Composite Fibers $ 16,601 $ 16,161
Total intangibles 17,271 16,917
Accumulated amortization (8,970) (7,027)
Net intangibles 8,301 9,890
Specialty Papers [Member] | Customer relationships [Member]
   
Goodwill and other intangible assets that are recorded as other long-term assets    
Total intangibles 6,155 6,155
Composite Fibers [Member] | Technology and related [Member]
   
Goodwill and other intangible assets that are recorded as other long-term assets    
Total intangibles 4,365 4,174
Composite Fibers [Member] | Customer relationships and related [Member]
   
Goodwill and other intangible assets that are recorded as other long-term assets    
Total intangibles 1,872 1,790
Advanced Airlaid Materials [Member] | Technology and related [Member]
   
Goodwill and other intangible assets that are recorded as other long-term assets    
Total intangibles 1,579 1,560
Advanced Airlaid Materials [Member] | Customer relationships and related [Member]
   
Goodwill and other intangible assets that are recorded as other long-term assets    
Total intangibles $ 3,300 $ 3,238