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TIMBERLAND ACQUISITIONS - Narrative (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 USD ($) a acquisition | Dec. 31, 2019 USD ($) a acquisition | Dec. 31, 2018 USD ($)
Business Acquisition [Line Items] |  |  |
Number of acres acquired of timberland | a | 15,012 | 70,919 |
Purchase of timberlands | $ 24,695 | $ 142,287 | $ 57,608
Alabama, Georgia, And Louisiana |  |  |
Business Acquisition [Line Items] |  |  |
Number of acres acquired of timberland | a | 13,000 |  |
Number of acquisitions | acquisition | 3 |  |
Aggregate value | $ 24,200 |  |
Payments to acquired timberlands, paid-in-kind | 24,100 |  |
Purchase of timberlands | $ 100 |  |
Florida, Georgia, Texas, And Washington |  |  |
Business Acquisition [Line Items] |  |  |
Number of acres acquired of timberland | a |  | 62,000 |
Number of acquisitions | acquisition |  | 16 |
Aggregate value |  | $ 106,300 |
Payments to acquired timberlands, paid-in-kind |  | 29,800 |
Purchase of timberlands |  | $ 76,500 |
New Zealand |  |  |
Business Acquisition [Line Items] |  |  |
Number of acres acquired of timberland | a | 2,378 | 9,223 |
Purchase of timberlands | $ 454 | $ 36,020 |
New Zealand | Property Subject to Operating Lease |  |  |
Business Acquisition [Line Items] |  |  |
Number of acres acquired of timberland | a | 2,000 | 2,000 |

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- Definition The cash outflow for acquisition of timber and timberlands during the period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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