TIMBERLAND ACQUISITIONS - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) a acquisition	Dec. 31, 2018 USD ($) a acquisition	Dec. 31, 2017 USD ($)
Business Acquisition [Line Items]
Timberlands acquired (acres) | a	70,919	29,857
Payments to acquire timberlands	$ 142,287	$ 57,608	$ 242,910
Florida, Georgia, Texas And Washington
Business Acquisition [Line Items]
Timberlands acquired (acres) | a	62,000
Number of acquisitions | acquisition	16
Aggregate value	$ 106,300
Payments to acquired timberlands, paid-in-kind	29,800
Payments to acquire timberlands	$ 76,500
New Zealand
Business Acquisition [Line Items]
Timberlands acquired (acres) | a	9,223	3,833
Number of acquisitions | acquisition		2
Payments to acquire timberlands	$ 36,020	$ 11,665
Florida, Georgia, And Texas
Business Acquisition [Line Items]
Timberlands acquired (acres) | a		26,000
Payments to acquired timberlands, paid-in-kind		$ 45,900
Property Subject to Operating Lease | New Zealand
Business Acquisition [Line Items]
Timberlands acquired (acres) | a	2,000