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Sales of Manufacturing Facilities:Sale of Assets (Details) - USD ($) $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
Mar. 01, 2019 | Nov. 02, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Proceeds from sale of facilities |  |  | $ 0 | $ 2,493 | $ 15,003
Loss on sale and curtailment of facilities |  |  | $ 1,707 | 0 | 38,314
Agreement to Sell Hardwood Facility at Moncure, North Carolina [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Disposal Group, Revenue |  |  |  | 5,500 | 32,700
Disposal Group, Operating Loss |  |  |  | $ (1,400) | (7,000)
Proceeds from sale of facilities | $ 2,500 |  |  |  |
Agreement to Sell Hardwood Facility at Moncure, North Carolina [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Loss on sale and curtailment of facilities [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Loss on sale and curtailment of facilities |  |  |  |  | 24,000
Agreement With Woodgrain Millwork for Two Lumber Mills and a Particleboard Plant In Northeast Oregon [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Disposal Group, Revenue |  |  |  |  | 74,100
Disposal Group, Operating Loss |  |  |  |  | (200)
Proceeds from sale of facilities |  | $ 15,000 |  |  |
Agreement With Woodgrain Millwork for Two Lumber Mills and a Particleboard Plant In Northeast Oregon [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Loss on sale and curtailment of facilities [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Loss on sale and curtailment of facilities |  |  |  |  | $ 11,500

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- Definition Amount of operating income (loss) attributable to disposal group, including, but not limited to, discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760 + Details
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- Definition Amount, before tax, of (gain) loss recognized for the (reversal of write-down) write-down to fair value, less cost to sell, of a disposal group. Excludes discontinued operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228 + Details
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