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Joint Venture Investment (Details) - a a in Millions | Dec. 31, 2017 | Mar. 31, 2016 | Mar. 03, 2016 | Apr. 30, 2013 | Apr. 04, 2013
--- | --- | --- | --- | --- | ---
Noncontrolling Interest [Line Items] |  |  |  |  |
Ownership percentage by parent |  | 77.00% | 77.00% | 65.00% | 65.00%
Acres of timberland owned | 2.6 |  |  |  |
Noncontrolling interest ownership percentage by noncontrolling owners |  |  |  | 23.00% |
Matariki Forestry Group |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Ownership percentage by parent | 77.00% |  |  |  |
Acres of timberland owned | 0.4 |  |  |  |
Noncontrolling interest ownership percentage by noncontrolling owners | 23.00% |  |  |  |

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- Details
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