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Other Noncurrent Liabilities - Summary of Other Noncurrent Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Other Liabilities Disclosure [Abstract]    
Reserve for uncertain tax positions $ 7,312 $ 7,312
Insurance claims and expenses 621 620
OPEB 1,519 1,846
Other 463 560
Total $ 9,915 $ 10,338