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Acquisitions - Additional Information (Detail)
€ in Millions, $ in Millions
 1 Months Ended 3 Months Ended
Aug. 31, 2016
USD ($)
May 31, 2016
USD ($)
May 31, 2015
USD ($)
Aug. 31, 2016
USD ($)
Sep. 30, 2016
USD ($)
Sep. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
May 31, 2016
EUR (€)
Business Acquisition [Line Items]                
Cash payment on acquisition         $ 213.0      
Goodwill         312.8   $ 195.3  
Amortization of intangible asset         5.5 $ 3.2    
Increase in goodwill         0.8      
Sividon Diagnostics GmbH                
Business Acquisition [Line Items]                
Total consideration transferred     $ 51.9          
Cash payment on acquisition     39.0          
Contingent consideration     10.9          
Goodwill     18.9          
Acquired intangible assets     $ 45.4          
Total cash consideration transferred   $ 39.0            
Business combination upfront and potential in additional performance based milestones             $ 16.8 € 15.0
Decrease in contingent consideration         0.4      
Decrease in intangibles         0.4      
Increase in goodwill         $ 0.8      
Assurex Health                
Business Acquisition [Line Items]                
Total consideration transferred $ 348.5     $ 348.5        
Cash payment on acquisition 213.0              
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.      
Amount of cash consideration deposited in escrow account       19.1        
Goodwill 116.3     116.3 $ 116.3      
Acquired intangible assets $ 298.8     $ 298.8        
Estimated net cash flows, discount rate         16.00%      
Acquisition costs         $ 5.0      
Revenue contributed by acquired entity         7.2      
Operating expenses related to acquired entity         15.1      
Amortization of intangible asset         1.9      
Assurex Health | Developed Technology                
Business Acquisition [Line Items]                
Acquired intangible assets         $ 256.5      
Intangible assets estimated useful lives         17 years      
Assurex Health | Database                
Business Acquisition [Line Items]                
Acquired intangible assets         $ 39.1      
Intangible assets estimated useful lives         5 years      
Assurex Health | Internally Developed Software                
Business Acquisition [Line Items]                
Acquired intangible assets         $ 3.2      
Intangible assets estimated useful lives         3 years