SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of Change in Reporting Entity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Income	$ 74,388	$ 107,027	$ 170,068
Net income attributable to Rayonier, L.P.	37,084	59,105	102,216
Rayonier Limited Partnership
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Income	74,388	107,027	170,068
Net income attributable to Rayonier, L.P.	$ 37,612	$ 59,105	$ 102,216
Basic earnings per unit attributable to Rayonier, L.P. (in dollars per unit)	$ 0.28	$ 0.46	$ 0.79
Diluted earnings per unit attributable to Rayonier, L.P. (in dollars per unit)	$ 0.27	$ 0.46	$ 0.79
Rayonier Limited Partnership | Revision of Prior Period, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Income	$ 0	$ 0	$ 0
Net income attributable to Rayonier, L.P.	$ (14,384)	$ (14,384)	$ (14,384)
Basic earnings per unit attributable to Rayonier, L.P. (in dollars per unit)	$ (0.11)	$ (0.11)	$ (0.11)
Diluted earnings per unit attributable to Rayonier, L.P. (in dollars per unit)	$ (0.11)	$ (0.11)	$ (0.11)