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Retirement Plans - Defined Benefit Plan, Amounts Recognized in Balance Sheet (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Long-term defined benefit plan liabilities $ (59,159) $ (55,853)
United States [Member] | Pension Plans [Member]    
Current defined benefit plan liabilities   (972)
Net amount of defined benefit plan recognized in balance sheet   (972)
United States [Member] | Retiree Healthcare Plan [Member]    
Current defined benefit plan liabilities (448) (387)
Long-term defined benefit plan liabilities (6,965) (6,257)
Net amount of defined benefit plan recognized in balance sheet (7,413) (6,644)
Non-U.S. Pension Plans [Member] | Pension Plans [Member]    
Long-term defined benefit plan liabilities 1,466 3,284
Current defined benefit plan liabilities (4) (1)
Long-term defined benefit plan liabilities (21,817) (15,418)
Net amount of defined benefit plan recognized in balance sheet $ (20,355) $ (12,135)