Discontinued Operations - Assets and Liabilities Held for Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Aug. 28, 2021	Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total current assets	$ 0		$ 72,562
Total assets			141,000
Total current liabilities	$ 0		780
Discontinued Operations, Disposed of by Sale | Lumber and Newsprint Facilities
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Inventory			62,837
Prepaid and other current assets			9,725
Total current assets			72,562
Property, plant and equipment, net			97,151
Other assets			43,552
Total assets		$ 215,000	213,265
Accrued and other current liabilities			780
Total current liabilities			780
Pension and Other Postretirement Benefits			9,316
Other long-term liabilities			2,498
Total liabilities			$ 12,594