Property, Plant and Equipment (Schedule of Damaged and Obsolete Fixed Asset Write-Offs, Disposal Costs, Insurance Recoveries for Ola, Arkansas Sawmill Fire and Net Gain on Fire Damage) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Property, Plant and Equipment [Line Items]
Net gain on fire damage	$ 3,361
Ola, Arkansas Sawmill [Member]
Property, Plant and Equipment [Line Items]
Fixed asset write-offs	(9,544)
Disposal costs	(2,595)
Total fixed asset loss on disposal	(12,139)
Insurance recoveries	15,000
Net gain on fire damage	2,861
Timberlands [Member]
Property, Plant and Equipment [Line Items]
Net gain on fire damage	$ 500