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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, 2020
Dec. 31, 2019
Disclosure Of Derivative Financial Instruments [line items]    
Notional amount € 26,255 € 40,366
British pounds [member]    
Disclosure Of Derivative Financial Instruments [line items]    
Notional amount 8,760 16,947
Euro [member]    
Disclosure Of Derivative Financial Instruments [line items]    
Notional amount 11,385 11,347
U.S. dollars [member]    
Disclosure Of Derivative Financial Instruments [line items]    
Notional amount 854 6,347
Canadian dollars [member]    
Disclosure Of Derivative Financial Instruments [line items]    
Notional amount 2,301 1,937
Japanese yen [member]    
Disclosure Of Derivative Financial Instruments [line items]    
Notional amount 1,293 1,549
Australian dollars [member]    
Disclosure Of Derivative Financial Instruments [line items]    
Notional amount 1,459 1,280
Danish kroner [member]    
Disclosure Of Derivative Financial Instruments [line items]    
Notional amount   751
Swedish kroner [member]    
Disclosure Of Derivative Financial Instruments [line items]    
Notional amount € 203 € 208