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Retirement Plans - Defined Benefit Plan, Accumulated Benefit Obligation (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
United States [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated benefit obligation   $ 972
Non-U.S. Pension Plans [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated benefit obligation $ 88,105 $ 82,026