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Retirement Plans - Defined Benefit Plan, Accumulated Other Comprehensive Income (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
United States [Member] | Pension Plans [Member]    
Accumulated Other Comprehensive Income [Abstract]    
Net actuarial loss   $ (59)
Total   (59)
United States [Member] | Retiree Healthcare Plan [Member]    
Accumulated Other Comprehensive Income [Abstract]    
Net actuarial loss $ (731) (83)
Prior service credit 93 112
Total (638) 29
Non-U.S. Pension Plans [Member] | Pension Plans [Member]    
Accumulated Other Comprehensive Income [Abstract]    
Net actuarial loss (20,600) (13,987)
Prior service credit 506 666
Total $ (20,094) $ (13,321)