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Gain on Dispositions of Plant, Equipment and Timberlands - Summary for Sale of Timberlands and Other Assets (Detail)
$ in Thousands
3 Months Ended
Mar. 31, 2021
USD ($)
a
Property, Plant and Equipment [Line Items]  
Proceeds $ 876
Gain $ 850
Timberlands [Member]  
Property, Plant and Equipment [Line Items]  
Acres | a 358
Proceeds $ 876
Gain $ 850