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Goodwill and Intangible Assets - Goodwill Associated with Reportable Segments (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Segment Reporting Information [Line Items]      
Reportable segment, goodwill $ 150,909 $ 150,733 $ 140,084
Advanced Manufacturing Capital Equipment [Member]
     
Segment Reporting Information [Line Items]      
Reportable segment, goodwill 142,241 142,065  
Analytical Solutions Group [Member]
     
Segment Reporting Information [Line Items]      
Reportable segment, goodwill 8,668 8,668  
Europe Region Sales & Service Operations [Member]
     
Segment Reporting Information [Line Items]      
Reportable segment, goodwill        
Asia Region Sales & Service Operations [Member]
     
Segment Reporting Information [Line Items]      
Reportable segment, goodwill