Certain Balance Sheet Components (Schedule of Damaged and Obsolete Fixed Asset Write-Offs, Disposal Costs, Insurance Recoveries for Ola, Arkansas Sawmill Fire and Gain on Fire Damage) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Property, Plant and Equipment [Line Items]
Gain on fire damage	$ (9,868)	$ 0	$ (9,592)	$ 0
Ola Arkansas Sawmill [Member]
Property, Plant and Equipment [Line Items]
Fixed asset write-offs	0	2,108	0	2,108
Disposal costs	132	0	836	0
Total fixed asset loss on disposal	132	2,108	836	2,108
Insurance recoveries	(10,000)	(2,108)	(10,000)	(2,108)
Gain on fire damage	(9,868)	0	(9,164)	0
Timber Properties [Member]
Property, Plant and Equipment [Line Items]
Insurance recoveries	$ 0	$ 0	$ (428)	$ 0