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Acquisitions - Additional Information (Detail) - USD ($)
 2 Months Ended 3 Months Ended 7 Months Ended 12 Months Ended
Jun. 11, 2015
Oct. 31, 2014
Oct. 25, 2013
Dec. 31, 2014
Dec. 31, 2013
Mar. 31, 2016
Dec. 31, 2015
Dec. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Business Acquisition [Line Items]                      
Payments of contingent consideration                     $ 388,000
Goodwill       $ 273,438,000     $ 488,413,000 $ 488,413,000 $ 488,413,000 $ 273,438,000  
ZTEC Instruments, Inc.                      
Business Acquisition [Line Items]                      
Total purchase price     $ 17,308,000                
Cash paid to acquire outstanding common and preferred stock     15,100,000                
Contingent consideration     2,200,000                
Revenues         $ 400,000            
Income (loss) before income taxes         $ (800,000)            
Net income                     163,394,000
Goodwill     12,520,000                
Avionics Interface Technologies, LLC                      
Business Acquisition [Line Items]                      
Total purchase price   $ 21,243,000                  
Cash paid to acquire outstanding common and preferred stock   19,400,000                  
Contingent consideration   1,800,000                  
Arrangement range of outcomes value high   $ 1,100,000                  
Revenues       600,000              
Income (loss) before income taxes       $ (800,000)              
Net income                   82,169,000 $ 164,087,000
Discount rate   4.70%                  
Goodwill, expected tax deduction   $ 10,500,000                  
Goodwill   $ 10,516,000                  
Universal Robots                      
Business Acquisition [Line Items]                      
Total purchase price $ 315,437,000                    
Cash paid to acquire outstanding common and preferred stock 283,800,000                    
Contingent consideration 31,600,000                    
Arrangement range of outcomes value high 65,000,000                    
Decrease in goodwill             (5,400,000)        
Contingent consideration adjustment             (2,200,000)        
Increase in intangible assets             1,600,000        
Decrease in acquired liabilities             $ (1,600,000)        
Goodwill, not deductible for tax purposes 221,100,000                    
Revenues               41,900,000      
Income (loss) before income taxes               $ (7,600,000)      
Net income                 199,784,000 61,078,000  
Goodwill $ 221,128,000                    
Universal Robots | Fair Value Adjustment to Inventory                      
Business Acquisition [Line Items]                      
Net income                 (1,600,000) 1,600,000  
Universal Robots | Acquisition Related Costs                      
Business Acquisition [Line Items]                      
Net income                 $ (1,000,000) $ 1,000,000  
Universal Robots | Scenario, Forecast                      
Business Acquisition [Line Items]                      
Payments of contingent consideration           $ 15,000,000          
EBITDA contingent consideration amount, percentage           100.00%          
Maximum | ZTEC Instruments, Inc.                      
Business Acquisition [Line Items]                      
Contingent consideration     $ 5,000,000