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Other Noncurrent Liabilities - Summary of Other Noncurrent Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Other Liabilities Disclosure [Abstract]    
Reserve for uncertain tax positions $ 1,717 $ 4,053
OPEB 985 1,129
Insurance claims and expenses 653 665
Other 425 413
Total $ 3,780 $ 6,260