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Inventories - Narrative (Detail) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Pulp, paperboard and tissue products $ 175,566 $ 159,499
Materials and supplies 91,801 86,892
Logs, pulpwood, chips and sawdust 20,496 19,853
Inventories $ 287,863 $ 266,244