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Summary of Restructuring Costs for Each Segment and Unallocated Corporate Costs (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 26 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]        
Restructuring Costs $ 5,057 $ 8,051 $ 2,048  
2011 Restructuring
        
Restructuring Cost and Reserve [Line Items]        
Restructuring Costs 2,283 6,057 1,967  
Cumulative Costs       10,307
2011 Restructuring | Laser Products
        
Restructuring Cost and Reserve [Line Items]        
Restructuring Costs 2,038 4,861 1,790  
Cumulative Costs       8,689
2011 Restructuring | Medical Technologies
        
Restructuring Cost and Reserve [Line Items]        
Restructuring Costs 48      
Cumulative Costs       48
2011 Restructuring | Precision Motion
        
Restructuring Cost and Reserve [Line Items]        
Restructuring Costs 5 52 65  
Cumulative Costs       122
2011 Restructuring | Corporate, Shared Services and Unallocated costs
        
Restructuring Cost and Reserve [Line Items]        
Restructuring Costs 192 1,144 112  
Cumulative Costs       1,448
2012 Restructuring
        
Restructuring Cost and Reserve [Line Items]        
Restructuring Costs   1,758    
2012 Restructuring | Laser Products
        
Restructuring Cost and Reserve [Line Items]        
Restructuring Costs   501    
2012 Restructuring | Precision Motion
        
Restructuring Cost and Reserve [Line Items]        
Restructuring Costs   951    
2012 Restructuring | Corporate, Shared Services and Unallocated costs
        
Restructuring Cost and Reserve [Line Items]        
Restructuring Costs   306    
2013 Restructuring
        
Restructuring Cost and Reserve [Line Items]        
Restructuring Costs 2,766      
2013 Restructuring | Laser Products
        
Restructuring Cost and Reserve [Line Items]        
Restructuring Costs 1,139      
2013 Restructuring | Medical Technologies
        
Restructuring Cost and Reserve [Line Items]        
Restructuring Costs 806      
2013 Restructuring | Precision Motion
        
Restructuring Cost and Reserve [Line Items]        
Restructuring Costs 378      
2013 Restructuring | Corporate, Shared Services and Unallocated costs
        
Restructuring Cost and Reserve [Line Items]        
Restructuring Costs $ 443