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Pro Forma Results Under Acquisition (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Universal Robots      
Business Acquisition [Line Items]      
Revenue $ 1,657,626 $ 1,686,689  
Net income $ 199,784 $ 61,078  
Net income per common share, basic $ 0.94 $ 0.30  
Net income per common share, diluted $ 0.94 $ 0.27  
Avionics Interface Technologies, LLC      
Business Acquisition [Line Items]      
Revenue   $ 1,655,038 $ 1,434,699
Net income   $ 82,169 $ 164,087
Net income per common share, basic   $ 0.40 $ 0.86
Net income per common share, diluted   $ 0.37 $ 0.70
ZTEC Instruments, Inc.      
Business Acquisition [Line Items]      
Revenue     $ 1,431,270
Net income     $ 163,394
Net income per common share, basic     $ 0.86
Net income per common share, diluted     $ 0.69