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Financial Instruments - Additional Information (Detail)
1 Months Ended 12 Months Ended
May 09, 2016
May 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
Country
Distributor
Dec. 31, 2015
USD ($)
Dec. 31, 2014
Jan. 31, 2016
USD ($)
Derivative [Line Items]            
Accumulated other comprehensive loss, expected to be reclassified in future earnings     $ 200,000      
Percentage of sales to distributors accounted for company net sales     36.00%      
Percentage of distributors' sale accounted by five largest distributors     51.00%      
Number of largest distributors accounting for distributors sales | Distributor     5      
Percentage of net sales accounted by one large distributor     8.00% 9.00% 9.00%  
Gross receivables from a distributor     $ 37,300,000 $ 45,400,000    
National Healthcare Systems and Private Sector Customers | Spain, Italy, Greece, and Portugal            
Derivative [Line Items]            
Accounts receivable, net     44,600,000      
Accounts receivable greater than 365 days past due     $ 3,300,000      
The number of countries in Europe in which certain collection risks exist | Country     4      
Medicon Inc            
Derivative [Line Items]            
Liability for deferred future payments for business combinations     $ 52,300,000 66,000,000    
Fair Value, Inputs, Level 2            
Derivative [Line Items]            
Fair value of long-term debt including current maturities and the effects of the related interest rate swap contract     1,688,000,000 1,449,800,000    
Fair Value, Inputs, Level 2 | Medicon Inc            
Derivative [Line Items]            
Liability for deferred future payments for business combinations     52,300,000 66,000,000    
Payment of deferred consideration financing related to business combinations     18,400,000      
Foreign Exchange Contract            
Derivative [Line Items]            
Notional value of derivative contracts     $ 243,200,000 $ 191,600,000    
Interest rate swap contract            
Derivative [Line Items]            
Notional value of derivative contracts           $ 250,000,000
Fixed-rate notes interest percentage           2.875%
Forward Starting Interest Rate Swaps            
Derivative [Line Items]            
Notional value of derivative contracts   $ 250,000,000        
Derivative instruments, loss recorded in accumulated other comprehensive loss   $ 23,300,000        
Forward Starting Interest Rate Swaps | 3.000% senior unsecured notes due 2026            
Derivative [Line Items]            
Fixed-rate notes interest percentage 3.00% 3.00%        
Debt instrument, maturity year 2026 2026