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Other Noncurrent Liabilities - Summary of Other Noncurrent Liabilities (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Other Liabilities Disclosure [Abstract]    
Reserve for uncertain tax positions $ 7,312 $ 7,312
Insurance claims and expenses 645 621
OPEB 1,454 1,519
Other 439 463
Total $ 9,850 $ 9,915