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Joint Venture Investment - Narrative (Details) a in Millions, NZD in Millions | Mar. 03, 2016 NZD | Dec. 31, 2016 a | Sep. 30, 2016 a | Mar. 02, 2016 | Apr. 30, 2013 | Apr. 04, 2013
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Debt Instrument [Line Items] |  |  |  |  |  |
Acres of timberland owned | a |  | 2.7 | 0.4 |  |  |
Ownership percentage by parent | 77.00% |  |  | 65.00% | 65.00% | 65.00%
Noncontrolling interest ownership percentage by noncontrolling owners |  |  | 23.00% |  | 23.00% |
New Zealand JV Revolving Credit Facility due 2016 at a variable interest rate of 3.54% at December 31, 2015 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Refinanced amount | NZD | NZD 235 |  |  |  |  |

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