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Derivative Financial Instruments - Summary of Euro Equivalent the Contractual Amounts of forward Exchange Contracts (Detail) - Forward exchange contract [member] - EUR (€)
€ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Disclosure Of Derivative Financial Instruments [line items]    
Notional amount € 40,366 € 43,645
British pounds [member]    
Disclosure Of Derivative Financial Instruments [line items]    
Notional amount 16,947 10,612
Euro [member]    
Disclosure Of Derivative Financial Instruments [line items]    
Notional amount 11,347 11,407
U.S. dollars [member]    
Disclosure Of Derivative Financial Instruments [line items]    
Notional amount 6,347 14,528
Canadian dollars [member]    
Disclosure Of Derivative Financial Instruments [line items]    
Notional amount 1,937 1,300
Japanese yen [member]    
Disclosure Of Derivative Financial Instruments [line items]    
Notional amount 1,549 2,318
Australian dollars [member]    
Disclosure Of Derivative Financial Instruments [line items]    
Notional amount 1,280 2,129
Danish kroner [member]    
Disclosure Of Derivative Financial Instruments [line items]    
Notional amount 751 1,086
Swedish kroner [member]    
Disclosure Of Derivative Financial Instruments [line items]    
Notional amount € 208 € 265