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SEGMENT AND GEOGRAPHICAL INFORMATION (Schedule of Non-Cash Cost of Land and Improved Development) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Segment Reporting Information [Line Items] |  |  |  |
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT | $ 2,115 | $ 1,272 | $ 17,051 | $ 14,374
Southern Timber |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT | 0 | 0 | 0 | 0
Pacific Northwest Timber |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT | 0 | 0 | 0 | 0
New Zealand Timber |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT | 0 | 0 | 0 | 0
Real Estate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT | 2,115 | 1,272 | 17,051 | 14,374
Real Estate | Timberland | Large Dispositions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT |  |  |  | 5,700
Trading |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
NON-CASH COST OF LAND AND IMPROVED DEVELOPMENT | $ 0 | $ 0 | $ 0 | $ 0

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