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Other Noncurrent Liabilities - Summary of Other Noncurrent Liabilities (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Other Liabilities Disclosure [Abstract]    
Reserve for uncertain tax positions $ 7,312 $ 7,312
OPEB 1,409 1,519
Insurance claims and expenses 621 621
Other 438 463
Total $ 9,780 $ 9,915