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Restructuring (Details Textual) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Gain (Loss) On Sale Of Property   $ 95
Pst Segment [Member]
   
Business Realignment Charges 1,646  
Other Liabilities [Member]
   
Restructuring Reserve 419 467
Facility Closing [Member]
   
Restructuring Reserve 765 1,920
Selling, General and Administrative Expenses [Member]
   
Restructuring and Related Cost, Incurred Cost 256 951
Cost of Sales [Member]
   
Business Realignment Charges $ 729