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Restructuring and Other - Additional Information (Detail)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
USD ($)
Oct. 02, 2016
USD ($)
Apr. 03, 2016
USD ($)
Dec. 31, 2015
USD ($)
Oct. 04, 2015
USD ($)
Jul. 05, 2015
USD ($)
Dec. 31, 2016
USD ($)
Employee
Dec. 31, 2015
USD ($)
Employee
Dec. 31, 2014
USD ($)
Employee
Restructuring Cost and Reserve                  
Other restructuring charges             $ 15,900 $ 3,600  
Contingent consideration adjustment             15,896 2,489 $ (630)
Severance benefit and charges             2,100    
Property, Plant and Equipment                  
Restructuring Cost and Reserve                  
Impairment of fixed assets and other expenses             4,200    
Impairment of fixed assets and expenses related to the Japan earthquake                  
Restructuring Cost and Reserve                  
Property insurance, recovery             5,400    
Impairment of fixed assets and expenses related to the Japan earthquake | Earthquake Related Expenses                  
Restructuring Cost and Reserve                  
Impairment of fixed assets and other expenses             1,200    
Universal Robots                  
Restructuring Cost and Reserve                  
Contingent consideration adjustment $ 5,400 $ 8,000 $ 1,200 $ 5,339     15,300 5,300  
Acquisition related costs               1,000  
Avionics Interface Technologies, LLC                  
Restructuring Cost and Reserve                  
Contingent consideration adjustment       $ (300) $ (1,000)   600 (1,300)  
Acquisition related costs                 400
ZTEC Corporation and Avionics Interface Technologies LLC                  
Restructuring Cost and Reserve                  
Contingent consideration adjustment               (2,900)  
ZTEC Instruments, Inc.                  
Restructuring Cost and Reserve                  
Contingent consideration adjustment           $ (1,600)   (1,600) (600)
Semiconductor Test and Wireless Test                  
Restructuring Cost and Reserve                  
Severance benefit and charges             $ 6,000   $ 1,600
Reduction in employees headcount | Employee             146   43
Semiconductor Test and Wireless Test | Wireless Test                  
Restructuring Cost and Reserve                  
Reduction in employees headcount | Employee             102    
Semiconductor Test and Wireless Test | Semiconductor Test                  
Restructuring Cost and Reserve                  
Reduction in employees headcount | Employee             44    
System Test and Semiconductor Test                  
Restructuring Cost and Reserve                  
Severance benefit and charges               $ 1,500  
Reduction in employees headcount | Employee               23