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Employee Benefit Plans - Funded Status of Defined Benefit Plans (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]      
Noncurrent pension asset $ 3,881 $ 4,294  
Defined Benefit Pension Plans      
Defined Benefit Plan Disclosure [Line Items]      
Balance at beginning of the year 50,350 49,249  
Interest cost 1,483 1,884 $ 1,808
Participant contributions   1  
Actuarial losses 4,353 2,582  
Change in currency exchange rates 307 260  
Benefits paid (3,620) (3,626)  
Benefit obligations at end of the year 52,873 50,350 49,249
Fair value at beginning of the year 46,313 40,626  
Actual return on plan assets 5,308 5,752  
Employer contributions 1,841 3,173  
Participant contributions   1  
Change in currency exchange rates 418 387  
Benefits paid (3,620) (3,626)  
Fair value of plan assets at end of year 50,260 46,313 $ 40,626
Funded status (2,613) (4,037)  
Noncurrent pension asset 3,881 4,294  
Current (102) (101)  
Noncurrent (6,392) (8,230)  
Amounts recognized in the Consolidated Balance Sheets (2,613) (4,037)  
Accumulated other comprehensive loss - actuarial losses, net 28,209 28,687  
Total 25,596 24,650  
Accumulated benefit obligations (ABO) $ 52,873 $ 50,350