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Pension and Other Post Retirement Benefit Plans - Schedule of Future Expected Pension Payments (Detail) - Gentherm GmbH
$ in Thousands
Dec. 31, 2019
USD ($)
United States  
Defined Benefit Plan Disclosure [Line Items]  
2020 $ 342
2021 342
2022 342
2023 342
2024 342
2025-2029 1,710
Total projected pension benefit payments 3,420
German Plan  
Defined Benefit Plan Disclosure [Line Items]  
2020 289
2021 287
2022 283
2023 293
2024 287
2025-2029 2,839
Total projected pension benefit payments $ 4,278