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Restructuring Costs and Other (Income) Expense, Net (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Sep. 28, 2013
Sep. 29, 2012
Restructuring Costs And Other Income and Expenses [Abstract]        
Restructuring Costs And Other (Income) Expense, Net $ 45,000 $ 0 $ 263,000 $ 307,000
Papermaking Systems Segment [Member] | 2013 Restructuring Plan [Member]
        
Restructuring Reserve [Roll Forward]        
Provision     2,003,000  
Usage     (679,000)  
Currency translation     (85,000)  
Balance at end of period 1,239,000   1,239,000  
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  
Usage     (633,000)  
Currency translation     (86,000)  
Balance at end of period 1,239,000   1,239,000  
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  
Papermaking Systems Segment [Member] | Other Cost [Member] | 2013 Restructuring Plan [Member]
        
Restructuring Reserve [Roll Forward]        
Provision     45,000  
Usage     (46,000)  
Currency translation     1,000  
Balance at end of period 0   0  
Papermaking Systems Segment [Member] | Other Cost [Member] | BRAZIL [Member} | 2013 Restructuring Plan [Member]
        
Restructuring Reserve [Roll Forward]        
Provision     $ 45,000