Summary of Significant Accounting Policies (Supplemental Disclosures to Consolidated Statements of Cash Flows) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
NONCASH INVESTING AND FINANCING ACTIVITIES
Accrued property, plant and equipment additions	$ 1,521	$ 1,142	$ 1,396
Accrued timberlands reforestation and roads	1,190	697	352
Equity issued as consideration for our acquisition of Loutre	100,930
Long-term debt assumed in our acquisition of Loutre	6,366
Long-term debt assumed by buyer in sale of facility			29,000
CASH FLOW INFORMATION
Interest, net of amounts capitalized	27,934	28,518	32,282
Income taxes, net	$ 98,670	$ 25,790	$ 7,148