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Restructuring Costs and Other (Income) Expense, Net (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 29, 2013
Jun. 30, 2012
Jun. 29, 2013
Jun. 30, 2012
Restructuring Costs And Other Income and Expenses [Abstract]        
Restructuring Costs And Other (Income) Expense, Net $ 218,000 $ 0 $ 218,000 $ 307,000
Papermaking Systems Segment [Member] | CHINA [Member]
        
Restructuring Costs And Other Income and Expenses [Abstract]        
Depreciation expense   307,000    
Pre-tax gain from sale of real estate 1,740,000      
Papermaking Systems Segment [Member] | Employee Severance [Member] | 2013 Restructuring Plan [Member]
        
Restructuring Reserve [Roll Forward]        
Provision 1,958,000   1,958,000  
Currency translation     (92,000)  
Balance at end of period 1,866,000   1,866,000  
Papermaking Systems Segment [Member] | Employee Severance [Member] | SWEDEN [Member] | 2013 Restructuring Plan [Member]
        
Restructuring Costs And Other Income and Expenses [Abstract]        
Number of employees reduced due to restructuring 25      
Restructuring Reserve [Roll Forward]        
Provision 628,000      
Papermaking Systems Segment [Member] | Employee Severance [Member] | BRAZIL [Member} | 2013 Restructuring Plan [Member]
        
Restructuring Costs And Other Income and Expenses [Abstract]        
Number of employees reduced due to restructuring 22      
Restructuring Reserve [Roll Forward]        
Provision $ 1,330,000