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Financial Instruments - Additional Information (Detail)
€ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2016
EUR (€)
contract
Sep. 30, 2016
USD ($)
contract
Sep. 30, 2016
USD ($)
contract
Mar. 31, 2016
swap
Derivative [Line Items]        
Derivative losses included in AOCI   $ 600,000    
Net investment hedge ineffectiveness   0 $ 0  
Cash flow hedge ineffectiveness   0 $ 0  
Foreign Exchange Forward [Member]        
Derivative [Line Items]        
Term of derivative     12 months  
Interest rate swaps [Member] | Swap [Member]        
Derivative [Line Items]        
Number of derivatives (swap) | swap       2
Number of instruments terminated (swap) | swap       2
Loss on settlement of derivatives € (2.9) $ 3,200,000    
Net Investment Hedging [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]        
Derivative [Line Items]        
Remaining maturity term     1 year  
Number of derivatives matured (contract) | contract 12 12 12