XML 77 R62.htm IDEA: XBRL DOCUMENT v3.20.4
Timber and Timberlands (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Timber And Timberlands [Abstract]      
Depletion from Company Owned Lands $ 46.3 $ 41.7 $ 43.9
Amortization of Logging Roads 3.6 $ 3.6 $ 3.4
Future payments due under timber cutting contracts $ 17.6