TIMBERLAND ACQUISITIONS - Summary of Timberland Acquisitions (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) a	Dec. 31, 2018 USD ($) a	Dec. 31, 2017 USD ($)
Business Acquisition [Line Items]
Cost | $	$ 142,287	$ 57,608	$ 242,910
Acres | a	70,919	29,857
Florida
Business Acquisition [Line Items]
Cost | $	$ 71,183	$ 35,560
Acres | a	42,522	20,513
Georgia
Business Acquisition [Line Items]
Cost | $	$ 13,395	$ 2,532
Acres | a	10,271	2,232
Texas
Business Acquisition [Line Items]
Cost | $	$ 14,349	$ 7,851
Acres | a	6,643	3,279
Washington
Business Acquisition [Line Items]
Cost | $	$ 7,340	$ 0
Acres | a	2,260	0
New Zealand
Business Acquisition [Line Items]
Cost | $	$ 36,020	$ 11,665
Acres | a	9,223	3,833