Income Taxes (Schedule of Components of Deferred Income Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Pension and other postretirement employee benefits	$ 20,342	$ 18,098
Inventories	754	892
Nondeductible accruals	1,921	1,663
Incentive compensation	1,946	1,444
Employee benefits	1,450	1,451
Net operating loss carryforwards	25,012	0
Other	944	790
Total deferred tax assets	52,369	24,338
Timber and timberlands, net	(1,820)	(1,827)
Property, plant and equipment, net	(66,724)	(51,704)
Intangible assets, net	(3,223)	(3,590)
Real estate development	(230)	(982)
Other	(1,495)	(2,876)
Total deferred tax liabilities	(73,492)	(60,979)
Deferred tax liabilities, net	$ (21,123)	$ (36,641)