SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)				12 Months Ended
	Oct. 01, 2020 USD ($)	May 08, 2020 segment	May 07, 2020 USD ($)	Dec. 31, 2020 USD ($) method $ / shares	Dec. 31, 2019 USD ($)	Mar. 31, 2012 USD ($)
Other Ownership Interests [Line Items]
Number of additional reportable segments | segment		1
Loan term				10 years
Marketable equity securities				$ 0	$ 10,582,000
Impairment				$ 0	0
Conversion ratio on redeemable common units				1
Number of primary methods or sales channels | method				2
Contract duration (or less)				1 year
Deposit required				5.00%
Separate Investment Accounts
Other Ownership Interests [Line Items]
Net liability position				$ 21,586,000	$ 23,801,000
New Zealand Timber
Other Ownership Interests [Line Items]
Impairment	$ 0
Minimum
Other Ownership Interests [Line Items]
Harvested in months, to be recorded as prepaid logging roads				24 months
Useful life				3 years
Life cycle of development projects				20 years
Minimum | Buildings
Other Ownership Interests [Line Items]
Useful life				15 years
Minimum | Land Improvements
Other Ownership Interests [Line Items]
Useful life				5 years
Maximum
Other Ownership Interests [Line Items]
Harvested in months, to be recorded as prepaid logging roads				60 months
Useful life				25 years
Life cycle of development projects				40 years
Maximum | Software Costs
Other Ownership Interests [Line Items]
Useful life				5 years
Maximum | Buildings
Other Ownership Interests [Line Items]
Useful life				35 years
Maximum | Land Improvements
Other Ownership Interests [Line Items]
Useful life				30 years
Senior Notes due 2022 at a fixed interest rate of 3.75%
Other Ownership Interests [Line Items]
Principal amount			$ 325,000,000			$ 325,000,000
Fixed interest rate			3.75%			3.75%
Rayonier Operating Company LLC
Other Ownership Interests [Line Items]
Ownership interest			100.00%
Operating Partnership
Other Ownership Interests [Line Items]
Ownership interest				96.90%
Ownership interest owned by limited partners		3.10%
CoBank [Member]
Other Ownership Interests [Line Items]
Equity Purchase, Percent Of Average Loan Balance				8.00%
Historical average loan				10 years
Equity purchase percentage by cash				75.00%
Equity percentage equity basis				25.00%
Cash value of stock until retired				$ 0
CoBank [Member] | Class A Common Stock
Other Ownership Interests [Line Items]
Common stock (in dollars per unit) | $ / shares				$ 100