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Acquisitions - Additional Information (Detail)
€ in Millions, $ in Millions
 1 Months Ended 3 Months Ended 6 Months Ended
Aug. 31, 2016
USD ($)
May 31, 2016
USD ($)
May 31, 2015
USD ($)
Aug. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
Jun. 30, 2016
USD ($)
May 31, 2016
EUR (€)
Business Acquisition [Line Items]                
Cash payment on acquisition           $ 216.1    
Goodwill         $ 315.4 315.4 $ 195.3  
Increase in goodwill due to working capital adjustment           0.8    
Decrease in contingent consideration           3.2    
Sividon Diagnostics GmbH [Member]                
Business Acquisition [Line Items]                
Total consideration transferred     $ 51.9          
Cash payment on acquisition     39.0          
Contingent consideration     10.9          
Business acquisition, net cash acquired     2.0          
Goodwill     18.9          
Acquired intangible assets     $ 45.4          
Total cash consideration transferred   $ 39.0            
Business combination upfront and potential in additional performance based milestones             15.8 € 15.0
Decrease in contingent consideration           0.4    
Decrease in intangibles           0.4    
Increase in goodwill           $ 0.8    
Assurex [Member]                
Business Acquisition [Line Items]                
Total consideration transferred $ 351.6     $ 351.6        
Cash payment on acquisition 216.1              
Additional payments upon completion of performance based milestones 185.0     185.0        
Contingent consideration 130.0     130.0        
Contingent consideration, valuation method           The fair value of the performance-based milestones was determined by using the Monte Carlo method.    
Business acquisition, net cash acquired 5.5     5.5        
Amount of cash consideration deposited in escrow account       19.1        
Goodwill 120.5     120.5 120.5 $ 120.5 $ 116.3  
Amount transfers into goodwill         1.7 1.7    
Increase in goodwill due to working capital adjustment           3.1    
Decrease in deferred tax liability due to a change in blended state tax rate           (0.6)    
Decrease in goodwill due to a change in blended state tax rate           $ (0.6)    
Acquired intangible assets $ 295.6     $ 295.6        
Estimated net cash flows, discount rate           16.00%    
Acquisition costs         5.0 $ 5.0    
Revenue contributed by acquired entity         21.8 29.0    
Operating expenses related to acquired entity         27.9 41.2    
Assurex [Member] | Developed Technology [Member]                
Business Acquisition [Line Items]                
Acquired intangible assets         256.5 $ 256.5    
Intangible assets estimated useful lives           17 years    
Assurex [Member] | Database [Member]                
Business Acquisition [Line Items]                
Acquired intangible assets         $ 39.1 $ 39.1    
Intangible assets estimated useful lives           5 years