| Fiscal period | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
| Period End Date | 12/31/2024 | 12/31/2023 | 12/31/2022 | 12/31/2021 | 12/31/2020 | 12/31/2019 | 12/31/2018 | 12/31/2017 | 12/31/2016 | 12/31/2015 |
| Revenues | 1,062.08 | 1,024.08 | 1,330.78 | 1,337.44 | 1,040.93 | 827.10 | 974.58 | 678.60 | 599.10 | 575.34 |
| Total Revenues | 1,062.08 | 1,024.08 | 1,330.78 | 1,337.44 | 1,040.93 | 827.10 | 974.58 | 678.60 | 599.10 | 575.34 |
| Cost of goods sold | 945.67 | 899.58 | 806.82 | 715.85 | 687.78 | -- | -- | 470.37 | 462.30 | 470.04 |
| Materials, labor and other operating expenses | -- | -- | -- | -- | -- | 682.07 | 707.65 | -- | -- | -- |
| Gross Profit | 116.40 | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Depreciation, depletion and amortization | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Selling, general and administrative expenses | 83.21 | 75.73 | 76.51 | 73.43 | 72.52 | 57.93 | 59.86 | 55.41 | 52.72 | 46.39 |
| Restructuring charges | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Asset impairment charge | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gain on sale of facility | -- | -- | -- | 0.00 | 0.00 | 9.18 | -- | -- | -- | -- |
| Environmental Remediation Charge | -- | -- | (5.55) | -- | -- | 0.00 | 0.00 | (4.98) | -- | 0.00 |
| Loss on sale of central Idaho timber and timberlands | -- | -- | -- | -- | -- | -- | 0.00 | 0.00 | (48.52) | -- |
| Gain on lumber price swap | -- | -- | -- | -- | -- | 0.00 | 0.00 | 1.09 | -- | -- |
| Deltic merger-related costs | -- | (2.45) | (27.33) | -- | 0.00 | 0.00 | (22.12) | (3.41) | -- | -- |
| Net loss (gain) on fire damage | -- | 39.44 | 34.51 | 3.36 | -- | -- | -- | -- | -- | -- |
| Total Operating Expenses | 1,028.88 | 938.33 | 881.70 | 785.92 | 760.30 | 730.82 | 789.63 | 533.07 | 563.55 | 516.43 |
| Operating Income (Loss) | 33.19 | 85.75 | 449.08 | 551.52 | 280.63 | 96.28 | 184.95 | 145.52 | 35.55 | 58.91 |
| Interest expense | 28.92 | 24.22 | 27.40 | 29.28 | 29.46 | 30.36 | 35.23 | 27.05 | 28.94 | 32.76 |
| Asset impairment charge | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Interest income | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other income (expense), net | 3.12 | 1.27 | (0.07) | -- | -- | -- | -- | -- | -- | -- |
| Debt retirement costs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income from Canadian lumber settlement | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Loss on extinguishment of debt | -- | -- | -- | 0.00 | 0.00 | (5.51) | -- | -- | -- | -- |
| Non-operating pension and other postretirement benefit costs | 0.80 | (0.91) | (8.14) | (13.23) | (14.23) | (3.74) | (7.65) | -- | -- | -- |
| Pension settlement charge | -- | -- | (14.17) | 0.00 | (42.99) | -- | -- | -- | -- | -- |
| Earnings before taxes | 8.19 | 61.89 | 399.31 | 509.02 | 193.95 | 56.67 | 142.08 | 118.47 | 6.61 | 26.15 |
| Provision (benefit) for taxes | (13.69) | (0.22) | 65.41 | 85.16 | 27.12 | 1.01 | 19.20 | 32.02 | (4.33) | (5.57) |
| Provision (benefit) for tax: Current | -- | -- | 70.67 | -- | -- | -- | -- | -- | (6.18) | 0.13 |
| Provision (benefit) for tax: Deferred | -- | -- | (5.30) | -- | -- | -- | -- | -- | 2.14 | 1.10 |
| Deferred tax adjustment due to REIT conversion | -- | -- | -- | -- | -- | -- | -- | -- | (0.29) | -- |
| Income (loss) from Continuing Operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Earnings from discontinued operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Discontinued operations: Income tax benefit | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net Income (loss) Available to Common Shareholders | 21.88 | 62.10 | 333.90 | 423.86 | 166.83 | 55.66 | 122.88 | 86.45 | 10.94 | 31.71 |
| Earnings per common share from continuing operations: | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Earnings per common share from discontinued operations: | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net Earnings Per Share (Basic) | 0.28 | 0.78 | 4.59 | 6.29 | 2.48 | 0.82 | 2.03 | 2.12 | 0.27 | 0.78 |
| Earnings per common share from continuing operations: | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Earnings per common share from discontinued operations: | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net Earnings Per Share (Diluted) | 0.28 | 0.77 | 4.58 | 6.26 | 2.47 | 0.82 | 1.99 | 2.10 | 0.27 | 0.77 |
| Weighted Average Shares Outstanding (Basic) | 79.24 | 79.99 | 72.74 | 67.35 | 67.24 | 67.61 | 60.53 | 40.82 | 40.80 | 40.84 |
| Weighted Average Shares Outstanding (Diluted) | 79.34 | 80.17 | 72.92 | 67.72 | 67.57 | 67.74 | 61.81 | 41.23 | 41.03 | 40.99 |