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Certain Balance Sheet Components (Schedule of Timber and Timberlands) (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Timber And Timberlands [Abstract]    
Timber and timberlands $ 1,524,562 $ 1,554,882
Logging roads 83,464 83,781
Total timber and timberlands, net $ 1,608,026 $ 1,638,663