TIMBERLAND ACQUISITIONS - Narrative (Details) $ in Thousands	12 Months Ended
	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