Summary of Significant Accounting Policies (Supplemental Disclosures to Consolidated Statements of Cash Flows) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
NONCASH INVESTING AND FINANCING ACTIVITIES
Accrued property, plant and equipment additions	$ 569	$ 1,521	$ 1,142
Accrued timberlands reforestation and roads	1,142	1,190	697
Long-term debt and other liabilities assumed in the CatchMark merger	323,102	0	0
Long-term debt assumed in the Loutre merger	0	6,366	0
CASH FLOW INFORMATION
Interest, net of amounts capitalized	26,254	27,934	28,518
Income taxes, net	70,000	98,670	25,790
CatchMark Merger [Member]
NONCASH INVESTING AND FINANCING ACTIVITIES
Equity issued as consideration	508,314	0	0
Loutre Merger [Member]
NONCASH INVESTING AND FINANCING ACTIVITIES
Equity issued as consideration	$ 0	$ 100,930	$ 0