Pension and Other Post Retirement Benefit Plans - Summary of Accumulated Benefit Obligations (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
United States
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 3,847	$ 3,871
German Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 8,934	$ 8,529

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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