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Retirement Plants - Defined Benefit Plan, Accumulated Other Comprehensive Income (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
United States [Member] | Pension Plans [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Net actuarial (loss) gain $ (59) $ (37,682)
Total (59) (37,682)
United States [Member] | Retiree Healthcare Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Net actuarial (loss) gain (83) 588
Prior service credit 112  
Total 29 588
Non-U.S. Pension Plans [Member] | Pension Plans [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Net actuarial (loss) gain (13,987) (18,857)
Prior service credit 666 530
Total $ (13,321) $ (18,327)