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Restructuring and Business Realignment Charges (Details Textual) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2012
Pst Segment [Member]
Jun. 30, 2012
Pst Segment [Member]
Jun. 30, 2012
Other Liabilities [Member]
Dec. 31, 2011
Other Liabilities [Member]
Jun. 30, 2012
Facility Closing [Member]
Dec. 31, 2011
Facility Closing [Member]
Jun. 30, 2012
Selling, General and Administrative Expenses [Member]
Jun. 30, 2011
Selling, General and Administrative Expenses [Member]
Jun. 30, 2012
Selling, General and Administrative Expenses [Member]
Jun. 30, 2011
Selling, General and Administrative Expenses [Member]
Jun. 30, 2012
Cost Of Sales [Member]
Pst Segment [Member]
Jun. 30, 2012
Cost Of Sales [Member]
Pst Segment [Member]
Restructuring and Related Cost, Incurred Cost             $ 45 $ 0 $ 70 $ 0    
Restructuring Reserve     367 467 2,091 1,920            
Business Realignment Charges $ 1,322 $ 1,636                 $ 623 $ 729